export declare const existy: <T>(val: T) => boolean;
export declare const truthy: <T>(val: T) => boolean;
export declare const containsString: (string: string, substr: string, insensitive?: boolean) => boolean;
export declare const isPrimitive: <T>(val: T) => boolean;
export declare const isFunction: <T>(val: T) => boolean;
export declare const isNumber: <T>(val: T) => boolean;
export declare const isString: (value: any) => value is string;
export declare const isObjectNotArray: <T>(val: T) => boolean;
export declare const isEmptyDeep: <T>(obj: T) => boolean;
export declare const stringIncludesAny: (strings: string[], string: string, insensitive?: boolean) => boolean;
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