public void setGroupForComponent(@NotNull RadComponent component, @Nullable RadButtonGroup value) {
    for(int i=myButtonGroups.size()-1; i >= 0; i--) {
      RadButtonGroup group = myButtonGroups.get(i);
      if (group == value) {
        group.add(component);
      }
      else {
        group.remove(component);
        if (group.isEmpty()) {
          myButtonGroups.remove(i);
        }
      }
    }
  }
public void setGroupForComponent(@NotNull RadComponent component, @Nullable RadButtonGroup value)