code: public ListActionTypesResult withActionTypes(ActionType... actionTypes) {
          if (this.actionTypes == null) {
              setActionTypes(new java.util.ArrayList<ActionType>(actionTypes.length));
          }
          for (ActionType ele : actionTypes) {
              this.actionTypes.add(ele);
          }
          return this;
      }
docs: <p>
  Provides details of the action types.
  </p>
  <p>
  <b>NOTE:</b> This method appends the values to the existing list (if any). Use
  {@link #setActionTypes(java.util.Collection)} or {@link #withActionTypes(java.util.Collection)} if you want to
  override the existing values.
  </p>
  
  @param actionTypes
  Provides details of the action types.
  @return Returns a reference to this object so that method calls can be chained together.