isNotUndefinedfunction isNotUndefined<T>(input: Undefinable<T>): input is NotUndefined<T>;§isNotUndefined<T>(input: Undefinable<T>): input is NotUndefined<T>[src]§Type Parameters§T[src]§Parameters§input: Undefinable<T>[src]§Return Type§input is NotUndefined<T>[src]