void (PsiElement place) { final PsiClass containingClass = PsiUtil.getContextClass(place); if (containingClass == null) throw new GrRefactoringError(GroovyRefactoringBundle.message("cannot.introduce.field.in.script")); if (containingClass.isInterface()) { throw new GrRefactoringError(GroovyRefactoringBundle.message("cannot.introduce.field.in.interface")); } if (PsiUtil.skipParentheses(place, false) == null) { throw new GrRefactoringError(GroovyRefactoringBundle.message("expression.contains.errors")); } }