get _toTreeCustomizer () {
      return () => undefined
      // remember: only return something if you're converting it!
      // see https://github.com/lodash/lodash/issues/2846
    }
/**
     * The customizer function to use when {@link _toTree} calls lodash's `cloneDeepWith` function.
     * Note that if you're not converting a value, then return <code>undefined</code>.
     *
     * This default customizer returns a function that simply returns <code>undefined</code>.
     *
     * If you need more sophisticated behavior, either override this method or override {@link _toTree}.
     *
     * @returns {*}
     * @private
     */
The customizer function to use when  _toTree calls lodash's `cloneDeepWith` function.
Note that if you're not converting a value, then return undefined.

This default customizer returns a function that simply returns undefined.

If you need more sophisticated behavior, either override this method or override  _toTree.

@returns {*}
@private
The customizer function to use when _toTree calls lodash ' s ` cloneDeepWith ` function . Note that if you ' re not converting a value then return undefined . This default customizer returns a function that simply returns undefined . If you need more sophisticated behavior either override this method or override _toTree . @returns { * } @private
get _toTreeCustomizer () {
      return () => undefined
    }
get _toTreeCustomizer ( ) { return ( ) => undefined }
The customizer function to use when {@link _toTree} calls lodash's `cloneDeepWith` function.
The customizer function to use when { @link _toTree } calls lodash ' s ` cloneDeepWith ` function .
// remember: only return something if you're converting it! // see https://github.com/lodash/lodash/issues/2846