private void RefreshTargetTile(GridController grid, GridElementController elem, Vector2?gridPosition = null)
{
var ray = HandleUtility.GUIPointToWorldRay(Event.current.mousePosition);
gridPosition = gridPosition ?? grid.RaycastGrid(ray);
targetTile = gridPosition == null ? new GridTile(0, 0) : grid.GetGridTile(gridPosition.Value);
isSuitableTile = grid.CanPlaceIn(elem, targetTile);
}