code: def get_or_create_instance(self, id=None, application=None, revision=None, environment=None, name=None, parameters=None, submodules=None,
                                 destroyInterval=None):
          
          try:
              instance = self.get_instance(id=id, name=name)
              if name and name != instance.name:
                  instance.rename(name)
                  instance.ready()
              return instance
          except exceptions.NotFoundError:
              return self.create_instance(application, revision, environment, name, parameters, submodules, destroyInterval)
docs: Get instance by id or name.
          If not found: create with given parameters