What function render select tag in sidebar , in gutenberg editor ?

Hello everyone ) I work with this ticket – https://core.trac.wordpress.org/ticket/52415 , but I still can not find function that takes data from wordpress and render it select tags in editor sidebar. I find only this chunk of script :

///from wordpress-svn\src\wp-includes\js\dist\components.js
return Object(_wordpress_element__WEBPACK_IMPORTED_MODULE_6__["createElement"])("ul", {
        ref: this.bindList,
        className: "components-form-token-field__suggestions-list",
        id: "components-form-token-suggestions-".concat(this.props.instanceId),
        role: "listbox"
      }, Object(lodash__WEBPACK_IMPORTED_MODULE_7__["map"])(this.props.suggestions, function (suggestion, index) {
        var match = _this5.computeSuggestionMatch(suggestion);
        console.log(suggestion, index);
        var classeName = classnames__WEBPACK_IMPORTED_MODULE_9___default()('components-form-token-field__suggestion', {
          'is-selected': index === _this5.props.selectedIndex
        });
        /* eslint-disable jsx-a11y/click-events-have-key-events */

        return Object(_wordpress_element__WEBPACK_IMPORTED_MODULE_6__["createElement"])("li", {
          id: "components-form-token-suggestions-".concat(_this5.props.instanceId, "-").concat(index),
          role: "option",
          className: classeName,
          key: _this5.props.displayTransform(suggestion),
          onMouseDown: _this5.handleMouseDown,
          onClick: _this5.handleClick(suggestion),
          onMouseEnter: _this5.handleHover(suggestion),
          "aria-selected": index === _this5.props.selectedIndex
        }, match ? Object(_wordpress_element__WEBPACK_IMPORTED_MODULE_6__["createElement"])("span", {
          "aria-label": _this5.props.displayTransform(suggestion)
        }, match.suggestionBeforeMatch, Object(_wordpress_element__WEBPACK_IMPORTED_MODULE_6__["createElement"])("strong", {
          className: "components-form-token-field__suggestion-match"
        }, match.suggestionMatch), match.suggestionAfterMatch) : _this5.props.displayTransform(suggestion));
        /* eslint-enable jsx-a11y/click-events-have-key-events */
      }));

Can anyone help me ? In what direction I must go ?