structure->fields = g_ptr_array_new_with_free_func(
(GDestroyNotify)destroy_structure_field);
structure->field_name_to_index = g_hash_table_new(NULL, NULL);
structure->fields = g_ptr_array_new_with_free_func(
(GDestroyNotify)destroy_structure_field);
structure->field_name_to_index = g_hash_table_new(NULL, NULL);