Method addSubview

packages/react-devtools-timeline/src/view-base/View.js:158–164

* Appends `view` to the list of this view's `subviews`.

(view: View)

   * Appends `view` to the list of this view's `subviews`.
   */
  addSubview(view: View) {
    if (this.subviews.includes(view)) {
      return;
    }
    this.subviews.push(view);
    view.superview = this;
  }

  /**
   * Breaks the subview-superview relationship between `view` and this view, if