child1 = &g_array_index(type1->fields, LttField, i);
child2 = &g_array_index(type2->fields, LttField, i);
different = check_fields_compatibility(event_type1,
child1 = &g_array_index(type1->fields, LttField, i);
child2 = &g_array_index(type2->fields, LttField, i);
different = check_fields_compatibility(event_type1,