/// <summary>
/// Returns the object nearest to the given coordinates.
/// </summary>
/// <param name="x">The x-value of the coordinates.</param>
/// <param name="y">The y-value of the coordinates.</param>
/// <param name="distance">The distance to the nearest object.</param>
/// <returns>The object nearest to the given coordinates.</returns>
public T GetNearestObject(double x, double y, out double distance)
{
double obtainedDistance = double.PositiveInfinity;
T obtainedObject = null;
_rootNode.GetNearestObject(x, y, ref obtainedObject, ref obtainedDistance);
distance = obtainedDistance;
return(obtainedObject);
}