src/vs/workbench/contrib/comments/browser/commentThreadWidget.ts/CommentThreadWidget/display
class CommentThreadWidget:	display(lineHeight: number) {
		const headHeight = Math.ceil(lineHeight * 1.2);
		this._header.updateHeight(headHeight);

		this._body.display();

		// create comment thread only when it supports reply
		if (this._commentThread.canReply) {
			this._createCommentForm();
		}
		this._createAdditionalActions();

		this._register(this._body.onDidResize(dimension => {
			this._refresh(dimension);
		}));

		// If there are no existing comments, place focus on the text area. This must be done after show, which also moves focus.
		// if this._commentThread.comments is undefined, it doesn't finish initialization yet, so we don't focus the editor immediately.
		if (this._commentThread.canReply && this._commentReply) {
			this._commentReply.focusIfNeeded();
		}

		this._bindCommentThreadListeners();
	}