export type Callback = (error?: Error | null) => void;
export type CallbackWithResult<T> = (error?: Error | null, result?: T | null) => void;
export type KeyValuePair = [string, string | null];
export type MultiCallback = (errors?: readonly (Error | null)[] | null) => void;
export type MultiGetCallback = (errors?: readonly (Error | null)[] | null, result?: readonly KeyValuePair[]) => void;
export type AsyncStorageStatic = {
    getItem: (key: string, callback?: CallbackWithResult<string>) => Promise<string | null>;
    setItem: (key: string, value: string, callback?: Callback) => Promise<void>;
    removeItem: (key: string, callback?: Callback) => Promise<void>;
    mergeItem: (key: string, value: string, callback?: Callback) => Promise<void>;
    clear: (callback?: Callback) => Promise<void>;
    getAllKeys: (callback?: CallbackWithResult<readonly string[]>) => Promise<readonly string[]>;
    flushGetRequests: () => void;
    multiGet: (keys: readonly string[], callback?: MultiGetCallback) => Promise<readonly KeyValuePair[]>;
    multiSet: (keyValuePairs: ReadonlyArray<readonly [string, string]>, callback?: MultiCallback) => Promise<void>;
    multiRemove: (keys: readonly string[], callback?: MultiCallback) => Promise<void>;
    multiMerge: (keyValuePairs: [string, string][], callback?: MultiCallback) => Promise<void>;
};
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