@Override
  protected TextRange surroundExpression(@NotNull GrExpression expression, PsiElement context) {
    GrParenthesizedExpression parenthesized = (GrParenthesizedExpression) GroovyPsiElementFactory.getInstance(expression.getProject()).createExpressionFromText("((Type)a)", context);
    GrTypeCastExpression typeCast = (GrTypeCastExpression) parenthesized.getOperand();
    replaceToOldExpression(typeCast.getOperand(), expression);
    GrTypeElement typeElement = typeCast.getCastTypeElement();
    int endOffset = typeElement.getTextRange().getStartOffset() + expression.getTextRange().getStartOffset();
    parenthesized = (GrParenthesizedExpression) expression.replaceWithExpression(parenthesized, false);

    final GrTypeCastExpression newTypeCast = (GrTypeCastExpression)parenthesized.getOperand();
    final GrTypeElement newTypeElement = newTypeCast.getCastTypeElement();
    newTypeElement.delete();
    return new TextRange(endOffset, endOffset);
  }
@Override
  protected TextRange surroundExpression(@NotNull GrExpression expression, PsiElement context)