code: public static <T extends Content> IgnoringPrompt<T> create(ContentType type, SendableMessage promptMessage) {
          return new IgnoringPrompt<>(type, promptMessage);
      }
docs: Creates new prompt
  @param type The enum representation of T to accept
  @param promptMessage The message to send before accepting input
  @param <T> Accepting content type
  @return New ignoring prompt