code: @Override
      @CheckReturnValue
      public WebhookManager reset(long fields)
      {
          super.reset(fields);
          if ((fields & NAME) == NAME)
              this.name = null;
          if ((fields & CHANNEL) == CHANNEL)
              this.channel = null;
          if ((fields & AVATAR) == AVATAR)
              this.avatar = null;
          return this;
      }
docs: Resets the fields specified by the provided bit-flag pattern.
  You can specify a combination by using a bitwise OR concat of the flag constants.
  <br>Example: {@code manager.reset(WebhookManager.CHANNEL | WebhookManager.NAME);}
  
  <p><b>Flag Constants:</b>
  <ul>
  <li>{@link #NAME}</li>
  <li>{@link #AVATAR}</li>
  <li>{@link #CHANNEL}</li>
  </ul>
  
  @param  fields
  Integer value containing the flags to reset.
  
  @return WebhookManager for chaining convenience