@Override
  public IntentionAction createCreateFieldFromUsageFix(GrReferenceExpression expr) {
    final String referenceName = expr.getReferenceName();
    return referenceName == null ? null : new CreateFieldFromUsageFix(expr, referenceName);
  }
@Override
  public IntentionAction createCreateFieldFromUsageFix(GrReferenceExpression expr)