@Override
    public void visitField(@NotNull GrField grField) {
      super.visitField(grField);
      if (grField.hasModifierProperty(PsiModifier.STATIC)) {
        return;
      }
      final String name = grField.getName();
      if (isValid(name)) {
        return;
      }
      registerVariableError(grField, name);
    }
@Override
    public void visitField(@NotNull GrField grField)