What is the test for standing in a motion for habeas corpus?

Although this court has exercised its discretion to address an issue of great importance for the guidance of the trial court in future proceedings involving the same parties, both of whom seek resolution by the court (see, e.g., Dix v. Superior Court (1991) 53 Cal.3d 442, 279 Cal.Rptr. 834, 807 P.2d 1063), real party in interest here has consistently challenged the petitioner's standing and opposed appellate resolution of the merits of the petition. Moreover, the habeas corpus judgment is final and the matter is moot. For those reasons, and because the underlying issue can be raised by interested parties in another action, there is no reason to address it here.