src/vs/workbench/api/common/extHostComments.ts/ExtHostCommentThread/getCommentByUniqueId
class ExtHostCommentThread:	getCommentByUniqueId(uniqueId: number): vscode.Comment | undefined {
		for (let key of this._commentsMap) {
			let comment = key[0];
			let id = key[1];
			if (uniqueId === id) {
				return comment;
			}
		}

		return;
	}