/// <summary>
/// Assign a key/value property to the vertex.
/// If a value already exists for this key, then the previous key/value is overwritten.
/// </summary>
/// <param name="property">The property type to set</param>
/// <param name="v">the property value</param>
public void SetProperty(PropertyType property, IComparable v)
{
m_vertexType.SetPropertyValue(VertexId, property, v);
}