shouldIncludeChildAddon() {
    return true;
  }
Can be used to exclude addons from being added as a child addon.

    #### Uses:

    - Abstract away multiple addons while only including one into the built assets

    @public
    @method shouldIncludeChildAddon
    @param {Addon} childAddon
    @return {Boolean} Whether or not a child addon is supposed to be included

    @example
    ```js
    shouldIncludeChildAddon(childAddon) {
      if(childAddon.name === 'ember-cli-some-legacy-select-component') {
        return this.options.legacyMode;
      } else if(childAddon.name === 'ember-cli-awesome-new-select-component') {
        return !this.options.legacyMode;
      } else {
        return this._super.shouldIncludeChildAddon.apply(this, arguments);
      }
    }
    ```