code: func yaml_mapping_start_event_initialize(event *yaml_event_t, anchor, tag []byte, implicit bool, style yaml_mapping_style_t) {
  	*event = yaml_event_t{
  		typ:      yaml_MAPPING_START_EVENT,
  		anchor:   anchor,
  		tag:      tag,
  		implicit: implicit,
  		style:    yaml_style_t(style),
  	}
  }
docs: // Create MAPPING-START.