public static boolean isStringLiteral(GrLiteral literal) {
    if (literal instanceof GrString) return true;

    if (literal instanceof GrLiteralImpl) {
      IElementType type = GrLiteralImpl.getLiteralType(literal);
      return TokenSets.STRING_LITERAL_SET.contains(type);
    }

    return false;
  }
public static boolean isStringLiteral(GrLiteral literal)