@Nullable
  private static PsiExpression getLast(PsiExpression[] oldArgs) {
    PsiExpression anchor;
    if (oldArgs.length > 0) {
      anchor = oldArgs[oldArgs.length - 1];
    }
    else {
      anchor = null;
    }
    return anchor;
  }
@Nullable
  private static PsiExpression getLast(PsiExpression[] oldArgs)