private void updateLibrariesList() {
    LibraryId id = getCompilerLibraryId();

    LibraryDescriptor[] items =
        (LibraryDescriptor[]) LibraryDescriptor.compilersFor(myEditorContext.getProject());
    DefaultComboBoxModel model = new DefaultComboBoxModel(items);
    model.insertElementAt(null, 0);
    myCompilerLibrary.setModel(model);
    myLibraryRenderer.setPrefixLength(lastIndexOfProperItemIn(items) + 1);

    setCompilerLibraryById(id);
  }