protected static Operator Init2(Operator op, BlockBase parent, NodeBase arg1, NodeBase arg2)
{
op.Parent = parent;
if (arg1 != null) op.values.Add(arg1);
if (arg2 != null) op.values.Add(arg2);
return op;
}
protected static Operator Init1(Operator op, BlockBase parent, NodeBase arg1)
{
return Init2(op, parent, arg1, null);
}