code: @SuppressWarnings("unchecked")
      public <R> Option<R> map(ThrowableFunction1<T, R> function) {
          return (Option<R>) this;
      }
docs: Always returns <code>this</code>. <br>
  I.e. the function is never used as {@link None} represents nothing/no value.
  
  @since 1.0