Questione giuridica chiave
Whether the landlord could be substituted by Y. SA before the Federal Supreme Court
Decisione estratta
No substitution was allowed because the asserted transfer of ownership was a new fact not established in the cantonal proceedings and therefore could not be considered.
Motivazione estratta
Under the Federal Supreme Court procedure, new facts are inadmissible; the alleged sale before the cantonal judgment had not been raised below.