Method insertAfter

src/tree/model/node.js:177–184

(child, ref)

  }

  insertAfter(child, ref) {
    let index;
    if (ref) {
      index = this.childNodes.indexOf(ref);
      if (index !== -1) index += 1;
    }
    this.insertChild(child, index);
  }

  removeChild(child) {
    const index = this.childNodes.indexOf(child);