defaultIfEmpty

Signature - source.ts#L2455

function defaultIfEmpty<T>(
    getDefaultValue: () => T,
): <U>(source: Source<U>) => Source<T | U>1 function defaultIfEmpty<T>(
2     getDefaultValue: () => T,
3 ): <U>(source: Source<U>) => Source<T | U>

1	function defaultIfEmpty<T>(
2	getDefaultValue: () => T,
3	): <U>(source: Source<U>) => Source<T \| U>