public void setChangeLists(@Nullable Collection<? extends ChangeList> changeLists) {
    if (changeLists == null) changeLists = ChangeListManager.getInstance(myProject).getChangeLists();
    myExistingListsCombo.setModel(new DefaultComboBoxModel<>(changeLists.toArray(new ChangeList[0])));
  }
public void setChangeLists(@Nullable Collection<? extends ChangeList> changeLists)