src/vs/editor/common/viewLayout/linesLayout.ts/LinesLayout/isInBottomPadding
class LinesLayout:	public isInBottomPadding(verticalOffset: number): boolean {
		if (this._paddingBottom === 0) {
			return false;
		}
		this._checkPendingChanges();
		const totalHeight = this.getLinesTotalHeight();
		return (verticalOffset >= totalHeight - this._paddingBottom);
	}