private MigrateGuavaTypeFix getFix(CommonProblemDescriptor descriptor) {
      final QuickFix<?>[] fixes = descriptor.getFixes();
      LOG.assertTrue(fixes != null);
      for (QuickFix<?> fix : fixes) {
        if (fix instanceof MigrateGuavaTypeFix) {
          return (MigrateGuavaTypeFix)fix;
        }
      }
      throw new AssertionError();
    }
private MigrateGuavaTypeFix getFix(CommonProblemDescriptor descriptor)