export declare function typeOf(v: unknown): string;
export declare const isBoolean: (val: unknown) => val is boolean;
export declare const isFunction: (val: unknown) => val is Function;
export declare const isNumber: (val: unknown) => val is number;
export declare const isString: (val: unknown) => val is string;
export declare const isObject: (val: unknown) => boolean;
export declare function filterUndefinedKey(obj?: Record<string, any> | undefined): Record<string, any>;
export declare function camelCaseToDashes(str: string): string;
export declare function flattenObj(ob?: Record<any, any>): Record<string, any>;
export declare function deepMerge<t = any>(target: any | undefined, source: any): t;
export declare function toArray<T extends object>(v?: T | T[]): T[];