/// <summary>
/// Add a factor tree node to the parents
/// of this factor tree node.
/// </summary>
/// <param name='factorTreeNode'>Factor tree node to add.</param>
public void AddParent(FactorTreeNode factorTreeNode)
{
_parents.Add(factorTreeNode);
}
/// <summary>
/// Add a factor tree node to the children
/// of this factor tree node.
/// </summary>
/// <param name='factorTreeNode'>Factor tree node to add.</param>
public void AddChild(FactorTreeNode factorTreeNode)
{
factorTreeNode.AddParent(this);
_children.Add(factorTreeNode);
}
