private static boolean qualifierHasSafeChain(GrExpression expression) {
    if (expression instanceof GrMethodCallExpression) {
      expression = ((GrMethodCallExpression)expression).getInvokedExpression();
    }
    if (!(expression instanceof GrReferenceExpression)) {
      return false;
    }
    if (GroovyTokenTypes.mOPTIONAL_CHAIN_DOT.equals(((GrReferenceExpression)expression).getDotTokenType())) {
      return true;
    }
    return qualifierHasSafeChain(((GrReferenceExpression)expression).getQualifierExpression());
  }
private static boolean qualifierHasSafeChain(GrExpression expression)