import { PromptMemory } from "promptrix";
/**
 * Forks an existing memory.
 * @remarks
 * A memory fork is a memory that is a copy of another memory, but can be modified without
 * affecting the original memory.
 */
export declare class MemoryFork implements PromptMemory {
    private readonly _fork;
    private readonly _memory;
    /**
     * Creates a new `MemoryFork` instance.
     * @param memory Memory to fork.
     */
    constructor(memory: PromptMemory);
    /**
     * Returns whether the memory contains the specified key.
     * @param key Name of the key to check.
     * @returns True if the memory contains the specified key, false otherwise.
     */
    has(key: string): boolean;
    /**
     * Gets the value of the specified key.
     * @param key Key to get the value of.
     * @returns Value of the key or undefined if missing.
     */
    get<TValue = any | undefined>(key: string): TValue;
    /**
     * Sets the value of the specified key.
     * @param key Key to set the value of.
     * @param value Value to set.
     */
    set<TValue = any>(key: string, value: TValue): void;
    /**
     * Deletes the specified key.
     * @param key Key to delete.
     */
    delete(key: string): void;
    /**
     * Clears the memory.
     */
    clear(): void;
}
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