/**
 * Generic, abstract base class for any scenario where we want to use a Singleton pattern. This base class abstracts away the complexity of ensuring a truly global
 * singleton instance across multiple code paths in a deployed application. It uses a Global Object Store to ensure that only one instance of the class exists in the application even
 * if the class has code imported into multiple execution paths (which is not optimal, of course, but can occur in some situations).
 */
export declare abstract class BaseSingleton<T> {
    private static _globalKeyPrefix;
    private _globalKey;
    get GlobalKey(): string;
    protected constructor();
    /**
     * Returns the singleton instance of the class. If the instance does not exist, it is created and stored in the Global Object Store.
     * If className is provided it will be used as part of the key in the Global Object Store, otherwise the actual class name will be used.
     * NOTE: the class name used by default is the lowest level of the object hierarchy, so if you have a class that extends another class, the lowest
     * level class name will be used.
     * @param this
     * @param className
     * @returns
     */
    protected static getInstance<T extends BaseSingleton<unknown>>(this: new () => T, className?: string): T;
    /**
     * The Global Object Store is a place to store global objects that need to be shared across the application. Depending on the execution environment, this could be the window object in a browser, or the global object in a node environment, or something else in other contexts. The key here is that in some cases static variables are not truly shared
     * because it is possible that a given class might have copies of its code in multiple paths in a deployed application. This approach ensures that no matter how many code copies might exist, there is only one instance of the object in question by using the Global Object Store.
     * @returns
     */
    GetGlobalObjectStore(): import("./util.js").GlobalObjectStore | null;
}
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