src/vs/editor/contrib/find/findWidget.ts/FindWidgetViewZone/constructor
class FindWidgetViewZone:	constructor(afterLineNumber: number) {
		this.afterLineNumber = afterLineNumber;

		this.heightInPx = FIND_INPUT_AREA_HEIGHT;
		this.suppressMouseDown = false;
		this.domNode = document.createElement('div');
		this.domNode.className = 'dock-find-viewzone';
	}