src/vs/editor/common/viewModelEventDispatcher.ts/ContentSizeChangedEvent/constructor
class ContentSizeChangedEvent:	constructor(oldContentWidth: number, oldContentHeight: number, contentWidth: number, contentHeight: number) {
		this._oldContentWidth = oldContentWidth;
		this._oldContentHeight = oldContentHeight;
		this.contentWidth = contentWidth;
		this.contentHeight = contentHeight;
		this.contentWidthChanged = (this._oldContentWidth !== this.contentWidth);
		this.contentHeightChanged = (this._oldContentHeight !== this.contentHeight);
	}