code: public ListListenersResult withListeners(Listener... listeners) {
          if (this.listeners == null) {
              setListeners(new java.util.ArrayList<Listener>(listeners.length));
          }
          for (Listener ele : listeners) {
              this.listeners.add(ele);
          }
          return this;
      }
docs: <p>
  The list of listeners for an accelerator.
  </p>
  <p>
  <b>NOTE:</b> This method appends the values to the existing list (if any). Use
  {@link #setListeners(java.util.Collection)} or {@link #withListeners(java.util.Collection)} if you want to
  override the existing values.
  </p>
  
  @param listeners
  The list of listeners for an accelerator.
  @return Returns a reference to this object so that method calls can be chained together.