/**
 * Type narrowing to allow property checking when object can be multiple types
 * https://fettblog.eu/typescript-hasownproperty/
 * Any code inside a block guarded by a conditional call to this function will have type narrowed to X
 */
export declare function hasOwnProperty<X extends {}, Y extends PropertyKey>(obj: X, prop: Y): obj is X & Record<Y, unknown>;
export declare function isObject(val: unknown): boolean;