message: Fix union escaping order.
  * Fix union escaping order.
  Fixes
  * style
diff: @@ -1638,7 +1638,9 @@ class CppGenerator : public BaseGenerator {
  auto full_struct_name = GetUnionElement(ev, true, true);
  // @TODO: Mby make this decisions more universal? How?
  - code_.SetValue("U_GET_TYPE", Name(field) + UnionTypeFieldSuffix());
  + code_.SetValue(
  + "U_GET_TYPE",
  + EscapeKeyword(field.name + UnionTypeFieldSuffix()));
  code_.SetValue(
  "U_ELEMENT_TYPE",
  WrapInNameSpace(u->defined_namespace, GetEnumValUse(*u, ev)));
  @@ -1994,8 +1996,9 @@ class CppGenerator : public BaseGenerator {
  std::string GenUnionUnpackVal(const FieldDef &afield,
  const char *vec_elem_access,
  const char *vec_type_access) {
  - return afield.value.type.enum_def->name + "Union::UnPack(" + "_e" +
  - vec_elem_access + ", " + Name(afield) + UnionTypeFieldSuffix() +
  + return afield.value.type.enum_def->name +
  + "Union::UnPack(" + "_e" + vec_elem_access + ", " +
  + EscapeKeyword(afield.name + UnionTypeFieldSuffix()) +
  "()" + vec_type_access + ", _resolver)";
  }
  