void (GrReferenceExpression ref) { final PsiElement nameElement = ref.getReferenceNameElement(); if (nameElement == null) return; final IElementType elementType = nameElement.getNode().getElementType(); if (GroovyTokenSets.STRING_LITERALS.contains(elementType)) { checkStringLiteral(nameElement); } else if (elementType == GroovyTokenTypes.mREGEX_LITERAL || elementType == GroovyTokenTypes.mDOLLAR_SLASH_REGEX_LITERAL) { checkRegexLiteral(nameElement); } }