unwrapNullableReturn input as T if the passed input is not null. Otherwise, throw TypeError. function unwrapNullable<T>(input: Nullable<T>): NotNull<T>;§unwrapNullable<T>(input: Nullable<T>): NotNull<T>[src]§Type Parameters§T[src]§Parameters§input: Nullable<T>[src]§Return Type§NotNull<T>[src]