src/vs/editor/browser/viewParts/blockDecorations/blockDecorations.ts/BlockDecorations/update
class BlockDecorations:	private update(): boolean {
		let didChange = false;
		const options = this._context.configuration.options;
		const layoutInfo = options.get(EditorOption.layoutInfo);
		const newContentWidth = layoutInfo.contentWidth - layoutInfo.verticalScrollbarWidth;

		if (this.contentWidth !== newContentWidth) {
			this.contentWidth = newContentWidth;
			didChange = true;
		}

		return didChange;
	}