code: func yaml_document_start_event_initialize(event *yaml_event_t, version_directive *yaml_version_directive_t,
  	tag_directives []yaml_tag_directive_t, implicit bool) bool {
  	*event = yaml_event_t{
  		typ:               yaml_DOCUMENT_START_EVENT,
  		version_directive: version_directive,
  		tag_directives:    tag_directives,
  		implicit:          implicit,
  	}
  	return true
  }
docs: // Create DOCUMENT-START.