/**
 * Copyright 2017 Matt Acosta
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
/**
 * Provides access to a lazily loaded external resource.
 *
 * @template T
 */
export declare class ResourceSet<T> {
    /**
     * The location of the resource.
     */
    protected resourcePath: string;
    /**
     * A key-value store for the resource data.
     */
    protected resources: {
        [key: string]: T;
    } | null;
    /**
     * Constructs a `ResourceSet` object.
     *
     * @param {string} resourcePath
     *   The location of the resource.
     */
    constructor(resourcePath: string);
    /**
     * Gets a value from the resource set.
     *
     * @param {string} key
     *   The identifier of the object in the resource set.
     */
    get(key: string): T;
    /**
     * Loads an external resource.
     *
     * @param {string} resourcePath
     *   The location of the resource.
     *
     * @returns {object}
     *   A key-value store containing the resource set's data.
     */
    protected loadResource(path: string): {
        [key: string]: T;
    };
}