yaml_propval_int
yaml_propval_int(emitter, markers, data, m->offset, chunk_len, 2);
yaml_propval_int(emitter, markers, data, m->offset, chunk_len, 4);
yaml_propval_int(emitter, markers, data, m->offset, chunk_len, 8);
yaml_propval_int(emitter, markers, data, m->offset, chunk_len, 1);