code: public SendBulkTemplatedEmailRequest withDefaultTags(MessageTag... defaultTags) {
          if (this.defaultTags == null) {
              setDefaultTags(new com.amazonaws.internal.SdkInternalList<MessageTag>(defaultTags.length));
          }
          for (MessageTag ele : defaultTags) {
              this.defaultTags.add(ele);
          }
          return this;
      }
docs: <p>
  A list of tags, in the form of name/value pairs, to apply to an email that you send to a destination using
  <code>SendBulkTemplatedEmail</code>.
  </p>
  <p>
  <b>NOTE:</b> This method appends the values to the existing list (if any). Use
  {@link #setDefaultTags(java.util.Collection)} or {@link #withDefaultTags(java.util.Collection)} if you want to
  override the existing values.
  </p>
  
  @param defaultTags
  A list of tags, in the form of name/value pairs, to apply to an email that you send to a destination using
  <code>SendBulkTemplatedEmail</code>.
  @return Returns a reference to this object so that method calls can be chained together.