public IBlock FindNodeById(string id)
{
if (id == ID)
{
return(this);
}
else
{
if (null != Molecule)
{
var node = Molecule.FindNodeById(id);
if (null != node)
{
return(node);
}
}
if (null != Denominator)
{
var deNode = Denominator.FindNodeById(id);
if (null != deNode)
{
return(deNode);
}
}
return(null);
}
}