@Override
 public SVariableDeclarator doRebuildParentState(
     SVariableDeclarator state, BUTree<SNodeOption> child) {
   return state.withInit(child);
 }
 @Override
 public SVariableDeclarator doRebuildParentState(
     SVariableDeclarator state, BUTree<SVariableDeclaratorId> child) {
   return state.withId(child);
 }