src/vs/editor/browser/view.ts/View/getTargetAtClientPoint
class View:	public getTargetAtClientPoint(clientX: number, clientY: number): IMouseTarget | null {
		const mouseTarget = this._pointerHandler.getTargetAtClientPoint(clientX, clientY);
		if (!mouseTarget) {
			return null;
		}
		return ViewUserInputEvents.convertViewToModelMouseTarget(mouseTarget, this._context.viewModel.coordinatesConverter);
	}