§ 15. Title through noncitizen. The right, title or interest in or to
real property in this state now held or hereafter acquired by any person
entitled to hold the same can not be questioned or impeached by reason
of the noncitizen status of any person through whom such title may have
been derived. Nothing in this section affects or impairs the right of
any heir, devisee, mortgagee, or creditor by judgment or otherwise.