public void beforeChildrenChange(@NotNull PsiTreeChangeEventImpl event) {
    beforeChange(true);
    event.setCode(PsiTreeChangeEventImpl.PsiEventType.BEFORE_CHILDREN_CHANGE);
    if (LOG.isDebugEnabled()) {
      LOG.debug("beforeChildrenChange: parent = " + logPsi(event.getParent()));
    }
    fireEvent(event);
  }
public void beforeChildrenChange(@NotNull PsiTreeChangeEventImpl event)