inject(view) {
    let sectionIndex = view.index;

    if (sectionIndex in this._annotationsBySectionIndex) {
      let annotations = this._annotationsBySectionIndex[sectionIndex];
      annotations.forEach(hash => {
        let annotation = this._annotations[hash];
        annotation.attach(view);
      });
    }
  }
Hook for injecting annotation into a view
@param {View} view
@private