export declare function isEmpty(value: string | null | undefined, ignoreWhitespace?: boolean): value is null | undefined;
export declare function isNotEmpty(value: string | null | undefined): value is string;
export declare function toTitleCase(str: string): string;
export declare function toTitleCaseFromKey(str: string): string;
export declare function toTitleCaseFromVariableName(str: string): string;