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/**
 * Applies a set of decorators to a target object.
 * @param decorators An array of decorators.
 * @param target The target object.
 * @returns The result of applying the provided decorators.
 * @remarks Decorators are applied in reverse order of their positions in the array.
 * @example
 *
 *     class Example { }
 *
 *     // constructor
 *     Example = Reflect.decorate(decoratorsArray, Example);
 *
 */
export declare function decorate(decorators: ClassDecorator[], target: Function): Function;
/**
 * Applies a set of decorators to a property of a target object.
 * @param decorators An array of decorators.
 * @param target The target object.
 * @param propertyKey The property key to decorate.
 * @param attributes A property descriptor.
 * @remarks Decorators are applied in reverse order.
 * @example
 *
 *     class Example {
 *         // property declarations are not part of ES6, though they are valid in TypeScript:
 *         // static staticProperty;
 *         // property;
 *
 *         static staticMethod() { }
 *         method() { }
 *     }
 *
 *     // property (on constructor)
 *     Reflect.decorate(decoratorsArray, Example, "staticProperty");
 *
 *     // property (on prototype)
 *     Reflect.decorate(decoratorsArray, Example.prototype, "property");
 *
 *     // method (on constructor)
 *     Object.defineProperty(Example, "staticMethod",
 *         Reflect.decorate(decoratorsArray, Example, "staticMethod",
 *             Object.getOwnPropertyDescriptor(Example, "staticMethod")));
 *
 *     // method (on prototype)
 *     Object.defineProperty(Example.prototype, "method",
 *         Reflect.decorate(decoratorsArray, Example.prototype, "method",
 *             Object.getOwnPropertyDescriptor(Example.prototype, "method")));
 *
 */
export declare function decorate(decorators: (PropertyDecorator | MethodDecorator)[], target: Object, propertyKey: string | symbol, attributes?: PropertyDescriptor): PropertyDescriptor;
/**
 * A default metadata decorator factory that can be used on a class, class member, or parameter.
 * @param metadataKey The key for the metadata entry.
 * @param metadataValue The value for the metadata entry.
 * @returns A decorator function.
 * @remarks
 * If `metadataKey` is already defined for the target and target key, the
 * metadataValue for that key will be overwritten.
 * @example
 *
 *     // constructor
 *     @Reflect.metadata(key, value)
 *     class Example {
 *     }
 *
 *     // property (on constructor, TypeScript only)
 *     class Example {
 *         @Reflect.metadata(key, value)
 *         static staticProperty;
 *     }
 *
 *     // property (on prototype, TypeScript only)
 *     class Example {
 *         @Reflect.metadata(key, value)
 *         property;
 *     }
 *
 *     // method (on constructor)
 *     class Example {
 *         @Reflect.metadata(key, value)
 *         static staticMethod() { }
 *     }
 *
 *     // method (on prototype)
 *     class Example {
 *         @Reflect.metadata(key, value)
 *         method() { }
 *     }
 *
 */
export declare function metadata(metadataKey: any, metadataValue: any): {
    (target: Function): void;
    (target: Object, propertyKey: string | symbol): void;
};
/**
 * Define a unique metadata entry on the target.
 * @param metadataKey A key used to store and retrieve metadata.
 * @param metadataValue A value that contains attached metadata.
 * @param target The target object on which to define metadata.
 * @example
 *
 *     class Example {
 *     }
 *
 *     // constructor
 *     Reflect.defineMetadata("custom:annotation", options, Example);
 *
 *     // decorator factory as metadata-producing annotation.
 *     function MyAnnotation(options): ClassDecorator {
 *         return target => Reflect.defineMetadata("custom:annotation", options, target);
 *     }
 *
 */
export declare function defineMetadata(metadataKey: any, metadataValue: any, target: Object): void;
/**
 * Define a unique metadata entry on the target.
 * @param metadataKey A key used to store and retrieve metadata.
 * @param metadataValue A value that contains attached metadata.
 * @param target The target object on which to define metadata.
 * @param propertyKey The property key for the target.
 * @example
 *
 *     class Example {
 *         // property declarations are not part of ES6, though they are valid in TypeScript:
 *         // static staticProperty;
 *         // property;
 *
 *         static staticMethod(p) { }
 *         method(p) { }
 *     }
 *
 *     // property (on constructor)
 *     Reflect.defineMetadata("custom:annotation", Number, Example, "staticProperty");
 *
 *     // property (on prototype)
 *     Reflect.defineMetadata("custom:annotation", Number, Example.prototype, "property");
 *
 *     // method (on constructor)
 *     Reflect.defineMetadata("custom:annotation", Number, Example, "staticMethod");
 *
 *     // method (on prototype)
 *     Reflect.defineMetadata("custom:annotation", Number, Example.prototype, "method");
 *
 *     // decorator factory as metadata-producing annotation.
 *     function MyAnnotation(options): PropertyDecorator {
 *         return (target, key) => Reflect.defineMetadata("custom:annotation", options, target, key);
 *     }
 *
 */
export declare function defineMetadata(metadataKey: any, metadataValue: any, target: Object, propertyKey: string | symbol): void;
/**
 * Gets a value indicating whether the target object or its prototype chain has the provided metadata key defined.
 * @param metadataKey A key used to store and retrieve metadata.
 * @param target The target object on which the metadata is defined.
 * @returns `true` if the metadata key was defined on the target object or its prototype chain; otherwise, `false`.
 * @example
 *
 *     class Example {
 *     }
 *
 *     // constructor
 *     result = Reflect.hasMetadata("custom:annotation", Example);
 *
 */
export declare function hasMetadata(metadataKey: any, target: Object): boolean;
/**
 * Gets a value indicating whether the target object or its prototype chain has the provided metadata key defined.
 * @param metadataKey A key used to store and retrieve metadata.
 * @param target The target object on which the metadata is defined.
 * @param propertyKey The property key for the target.
 * @returns `true` if the metadata key was defined on the target object or its prototype chain; otherwise, `false`.
 * @example
 *
 *     class Example {
 *         // property declarations are not part of ES6, though they are valid in TypeScript:
 *         // static staticProperty;
 *         // property;
 *
 *         static staticMethod(p) { }
 *         method(p) { }
 *     }
 *
 *     // property (on constructor)
 *     result = Reflect.hasMetadata("custom:annotation", Example, "staticProperty");
 *
 *     // property (on prototype)
 *     result = Reflect.hasMetadata("custom:annotation", Example.prototype, "property");
 *
 *     // method (on constructor)
 *     result = Reflect.hasMetadata("custom:annotation", Example, "staticMethod");
 *
 *     // method (on prototype)
 *     result = Reflect.hasMetadata("custom:annotation", Example.prototype, "method");
 *
 */
export declare function hasMetadata(metadataKey: any, target: Object, propertyKey: string | symbol): boolean;
/**
 * Gets a value indicating whether the target object has the provided metadata key defined.
 * @param metadataKey A key used to store and retrieve metadata.
 * @param target The target object on which the metadata is defined.
 * @returns `true` if the metadata key was defined on the target object; otherwise, `false`.
 * @example
 *
 *     class Example {
 *     }
 *
 *     // constructor
 *     result = Reflect.hasOwnMetadata("custom:annotation", Example);
 *
 */
export declare function hasOwnMetadata(metadataKey: any, target: Object): boolean;
/**
 * Gets a value indicating whether the target object has the provided metadata key defined.
 * @param metadataKey A key used to store and retrieve metadata.
 * @param target The target object on which the metadata is defined.
 * @param propertyKey The property key for the target.
 * @returns `true` if the metadata key was defined on the target object; otherwise, `false`.
 * @example
 *
 *     class Example {
 *         // property declarations are not part of ES6, though they are valid in TypeScript:
 *         // static staticProperty;
 *         // property;
 *
 *         static staticMethod(p) { }
 *         method(p) { }
 *     }
 *
 *     // property (on constructor)
 *     result = Reflect.hasOwnMetadata("custom:annotation", Example, "staticProperty");
 *
 *     // property (on prototype)
 *     result = Reflect.hasOwnMetadata("custom:annotation", Example.prototype, "property");
 *
 *     // method (on constructor)
 *     result = Reflect.hasOwnMetadata("custom:annotation", Example, "staticMethod");
 *
 *     // method (on prototype)
 *     result = Reflect.hasOwnMetadata("custom:annotation", Example.prototype, "method");
 *
 */
export declare function hasOwnMetadata(metadataKey: any, target: Object, propertyKey: string | symbol): boolean;
/**
 * Gets the metadata value for the provided metadata key on the target object or its prototype chain.
 * @param metadataKey A key used to store and retrieve metadata.
 * @param target The target object on which the metadata is defined.
 * @returns The metadata value for the metadata key if found; otherwise, `undefined`.
 * @example
 *
 *     class Example {
 *     }
 *
 *     // constructor
 *     result = Reflect.getMetadata("custom:annotation", Example);
 *
 */
export declare function getMetadata(metadataKey: any, target: Object): any;
/**
 * Gets the metadata value for the provided metadata key on the target object or its prototype chain.
 * @param metadataKey A key used to store and retrieve metadata.
 * @param target The target object on which the metadata is defined.
 * @param propertyKey The property key for the target.
 * @returns The metadata value for the metadata key if found; otherwise, `undefined`.
 * @example
 *
 *     class Example {
 *         // property declarations are not part of ES6, though they are valid in TypeScript:
 *         // static staticProperty;
 *         // property;
 *
 *         static staticMethod(p) { }
 *         method(p) { }
 *     }
 *
 *     // property (on constructor)
 *     result = Reflect.getMetadata("custom:annotation", Example, "staticProperty");
 *
 *     // property (on prototype)
 *     result = Reflect.getMetadata("custom:annotation", Example.prototype, "property");
 *
 *     // method (on constructor)
 *     result = Reflect.getMetadata("custom:annotation", Example, "staticMethod");
 *
 *     // method (on prototype)
 *     result = Reflect.getMetadata("custom:annotation", Example.prototype, "method");
 *
 */
export declare function getMetadata(metadataKey: any, target: Object, propertyKey: string | symbol): any;
/**
 * Gets the metadata value for the provided metadata key on the target object.
 * @param metadataKey A key used to store and retrieve metadata.
 * @param target The target object on which the metadata is defined.
 * @returns The metadata value for the metadata key if found; otherwise, `undefined`.
 * @example
 *
 *     class Example {
 *     }
 *
 *     // constructor
 *     result = Reflect.getOwnMetadata("custom:annotation", Example);
 *
 */
export declare function getOwnMetadata(metadataKey: any, target: Object): any;
/**
 * Gets the metadata value for the provided metadata key on the target object.
 * @param metadataKey A key used to store and retrieve metadata.
 * @param target The target object on which the metadata is defined.
 * @param propertyKey The property key for the target.
 * @returns The metadata value for the metadata key if found; otherwise, `undefined`.
 * @example
 *
 *     class Example {
 *         // property declarations are not part of ES6, though they are valid in TypeScript:
 *         // static staticProperty;
 *         // property;
 *
 *         static staticMethod(p) { }
 *         method(p) { }
 *     }
 *
 *     // property (on constructor)
 *     result = Reflect.getOwnMetadata("custom:annotation", Example, "staticProperty");
 *
 *     // property (on prototype)
 *     result = Reflect.getOwnMetadata("custom:annotation", Example.prototype, "property");
 *
 *     // method (on constructor)
 *     result = Reflect.getOwnMetadata("custom:annotation", Example, "staticMethod");
 *
 *     // method (on prototype)
 *     result = Reflect.getOwnMetadata("custom:annotation", Example.prototype, "method");
 *
 */
export declare function getOwnMetadata(metadataKey: any, target: Object, propertyKey: string | symbol): any;
/**
 * Gets the metadata keys defined on the target object or its prototype chain.
 * @param target The target object on which the metadata is defined.
 * @returns An array of unique metadata keys.
 * @example
 *
 *     class Example {
 *     }
 *
 *     // constructor
 *     result = Reflect.getMetadataKeys(Example);
 *
 */
export declare function getMetadataKeys(target: Object): any[];
/**
 * Gets the metadata keys defined on the target object or its prototype chain.
 * @param target The target object on which the metadata is defined.
 * @param propertyKey The property key for the target.
 * @returns An array of unique metadata keys.
 * @example
 *
 *     class Example {
 *         // property declarations are not part of ES6, though they are valid in TypeScript:
 *         // static staticProperty;
 *         // property;
 *
 *         static staticMethod(p) { }
 *         method(p) { }
 *     }
 *
 *     // property (on constructor)
 *     result = Reflect.getMetadataKeys(Example, "staticProperty");
 *
 *     // property (on prototype)
 *     result = Reflect.getMetadataKeys(Example.prototype, "property");
 *
 *     // method (on constructor)
 *     result = Reflect.getMetadataKeys(Example, "staticMethod");
 *
 *     // method (on prototype)
 *     result = Reflect.getMetadataKeys(Example.prototype, "method");
 *
 */
export declare function getMetadataKeys(target: Object, propertyKey: string | symbol): any[];
/**
 * Gets the unique metadata keys defined on the target object.
 * @param target The target object on which the metadata is defined.
 * @returns An array of unique metadata keys.
 * @example
 *
 *     class Example {
 *     }
 *
 *     // constructor
 *     result = Reflect.getOwnMetadataKeys(Example);
 *
 */
export declare function getOwnMetadataKeys(target: Object): any[];
/**
 * Gets the unique metadata keys defined on the target object.
 * @param target The target object on which the metadata is defined.
 * @param propertyKey The property key for the target.
 * @returns An array of unique metadata keys.
 * @example
 *
 *     class Example {
 *         // property declarations are not part of ES6, though they are valid in TypeScript:
 *         // static staticProperty;
 *         // property;
 *
 *         static staticMethod(p) { }
 *         method(p) { }
 *     }
 *
 *     // property (on constructor)
 *     result = Reflect.getOwnMetadataKeys(Example, "staticProperty");
 *
 *     // property (on prototype)
 *     result = Reflect.getOwnMetadataKeys(Example.prototype, "property");
 *
 *     // method (on constructor)
 *     result = Reflect.getOwnMetadataKeys(Example, "staticMethod");
 *
 *     // method (on prototype)
 *     result = Reflect.getOwnMetadataKeys(Example.prototype, "method");
 *
 */
export declare function getOwnMetadataKeys(target: Object, propertyKey: string | symbol): any[];
/**
 * Deletes the metadata entry from the target object with the provided key.
 * @param metadataKey A key used to store and retrieve metadata.
 * @param target The target object on which the metadata is defined.
 * @returns `true` if the metadata entry was found and deleted; otherwise, false.
 * @example
 *
 *     class Example {
 *     }
 *
 *     // constructor
 *     result = Reflect.deleteMetadata("custom:annotation", Example);
 *
 */
export declare function deleteMetadata(metadataKey: any, target: Object): boolean;
/**
 * Deletes the metadata entry from the target object with the provided key.
 * @param metadataKey A key used to store and retrieve metadata.
 * @param target The target object on which the metadata is defined.
 * @param propertyKey The property key for the target.
 * @returns `true` if the metadata entry was found and deleted; otherwise, false.
 * @example
 *
 *     class Example {
 *         // property declarations are not part of ES6, though they are valid in TypeScript:
 *         // static staticProperty;
 *         // property;
 *
 *         static staticMethod(p) { }
 *         method(p) { }
 *     }
 *
 *     // property (on constructor)
 *     result = Reflect.deleteMetadata("custom:annotation", Example, "staticProperty");
 *
 *     // property (on prototype)
 *     result = Reflect.deleteMetadata("custom:annotation", Example.prototype, "property");
 *
 *     // method (on constructor)
 *     result = Reflect.deleteMetadata("custom:annotation", Example, "staticMethod");
 *
 *     // method (on prototype)
 *     result = Reflect.deleteMetadata("custom:annotation", Example.prototype, "method");
 *
 */
export declare function deleteMetadata(metadataKey: any, target: Object, propertyKey: string | symbol): boolean;