extensions/references-view/src/calls/model.ts/CallsModel/remove
class CallsModel:	remove(item: CallItem) {
		const isInRoot = this.roots.includes(item);
		const siblings = isInRoot ? this.roots : item.parent?.children;
		if (siblings) {
			del(siblings, item);
			this._onDidChange.fire(this);
		}
	}