private void HookNodeLeftOrRight(SetNode <T> parent, SetNode <T> formerChild, SetNode <T> currChild)
{
if (parent == null)
{
this.root = currChild;
return;
}
else if (parent.LeftChild == formerChild)
{
parent.LeftChild = currChild;
}
else
{
parent.RightChild = currChild;
}
}