code: public DescribeEventCategoriesResult withEventCategoriesMapList(EventCategoriesMap... eventCategoriesMapList) {
          if (this.eventCategoriesMapList == null) {
              setEventCategoriesMapList(new java.util.ArrayList<EventCategoriesMap>(eventCategoriesMapList.length));
          }
          for (EventCategoriesMap ele : eventCategoriesMapList) {
              this.eventCategoriesMapList.add(ele);
          }
          return this;
      }
docs: <p>
  A list of event category maps.
  </p>
  <p>
  <b>NOTE:</b> This method appends the values to the existing list (if any). Use
  {@link #setEventCategoriesMapList(java.util.Collection)} or
  {@link #withEventCategoriesMapList(java.util.Collection)} if you want to override the existing values.
  </p>
  
  @param eventCategoriesMapList
  A list of event category maps.
  @return Returns a reference to this object so that method calls can be chained together.