static void rec(QualifiedElement q, QualifiedNameSyntax name)
{
if (name.Left is QualifiedNameSyntax qs)
{
rec(q, qs);
}
else if (name.Left is SimpleNameSyntax sn)
{
_ = new IdentityElement(q, sn.Identifier.Text);
}
else
{
throw new InvalidOperationException($"{name.Left.GetType().Name} is unexpected");
}
_ = new IdentityElement(q, name.Right.Identifier.Text);
}