code: def update_vault(self, vault_form):
          
          # Implemented from template for
          # osid.resource.BinAdminSession.update_bin_template
          if self._catalog_session is not None:
              return self._catalog_session.update_catalog(catalog_form=vault_form)
          collection = JSONClientValidated('authorization',
                                           collection='Vault',
                                           runtime=self._runtime)
          if not isinstance(vault_form, ABCVaultForm):
              raise errors.InvalidArgument('argument type is not an VaultForm')
          if not vault_form.is_for_update():
              raise errors.InvalidArgument('the VaultForm is for update only, not create')
          try:
              if self._forms[vault_form.get_id().get_identifier()] == UPDATED:
                  raise errors.IllegalState('vault_form already used in an update transaction')
          except KeyError:
              raise errors.Unsupported('vault_form did not originate from this session')
          if not vault_form.is_valid():
              raise errors.InvalidArgument('one or more of the form elements is invalid')
          collection.save(vault_form._my_map)  # save is deprecated - change to replace_one
  
          self._forms[vault_form.get_id().get_identifier()] = UPDATED
  
          # Note: this is out of spec. The OSIDs don't require an object to be returned
          return objects.Vault(osid_object_map=vault_form._my_map, runtime=self._runtime, proxy=self._proxy)
docs: Updates an existing vault.
  
          arg:    vault_form (osid.authorization.VaultForm): the form
                  containing the elements to be updated
          raise:  IllegalState - ``vault_form`` already used in an update
                  transaction
          raise:  InvalidArgument - the form contains an invalid value
          raise:  NullArgument - ``vault_form`` is ``null``
          raise:  OperationFailed - unable to complete request
          raise:  PermissionDenied - authorization failure
          raise:  Unsupported - ``vault_form`` did not originate from
                  ``get_vault_form_for_update()``
          *compliance: mandatory -- This method must be implemented.*