src/vs/editor/common/viewLayout/viewLayout.ts/ViewLayout/_getContentHeight
class ViewLayout:	private _getContentHeight(width: number, height: number, contentWidth: number): number {
		const options = this._configuration.options;

		let result = this._linesLayout.getLinesTotalHeight();
		if (options.get(EditorOption.scrollBeyondLastLine)) {
			result += Math.max(0, height - options.get(EditorOption.lineHeight) - options.get(EditorOption.padding).bottom);
		} else {
			result += this._getHorizontalScrollbarHeight(width, contentWidth);
		}

		return result;
	}