code: public static DefaultListModel leftShift(DefaultListModel self, Object e) {
          self.addElement(e);
          return self;
      }
docs: Overloads the left shift operator to provide an easy way to add
  elements to a DefaultListModel.
  
  @param self a DefaultListModel
  @param e    an element to be added to the listModel.
  @return same listModel, after the value was added to it.
  @since 1.6.4