export declare function hasKey<K extends string>(obj: object, key: K): obj is Record<K, unknown>;
export declare function hasStringAtKey<K extends string>(obj: object, key: K): obj is Record<K, string>;
export declare function hasValueAtKey<K extends string>(obj: object, key: K, value: unknown): obj is Record<K, unknown>;
export declare function hasFunctionAtKey<K extends string>(obj: object, key: K): obj is Record<K, (...args: any[]) => any>;
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