code: public ServerGroup withServerList(Server... serverList) {
          if (this.serverList == null) {
              setServerList(new java.util.ArrayList<Server>(serverList.length));
          }
          for (Server ele : serverList) {
              this.serverList.add(ele);
          }
          return this;
      }
docs: <p>
  List of servers belonging to a server group.
  </p>
  <p>
  <b>NOTE:</b> This method appends the values to the existing list (if any). Use
  {@link #setServerList(java.util.Collection)} or {@link #withServerList(java.util.Collection)} if you want to
  override the existing values.
  </p>
  
  @param serverList
  List of servers belonging to a server group.
  @return Returns a reference to this object so that method calls can be chained together.