src/vs/workbench/contrib/comments/browser/commentsEditorContribution.ts/ReviewViewZone/constructor
class ReviewViewZone:	constructor(afterLineNumber: number, onDomNodeTop: (top: number) => void) {
		this.afterLineNumber = afterLineNumber;
		this.callback = onDomNodeTop;

		this.domNode = $('.review-viewzone');
	}