code: def get_id(self):
          
          return Id(
              identifier=str(self._my_map['_id']),
              namespace=self._namespace,
              authority=self._authority)
docs: Gets the Id associated with this instance of this OSID object.
  
          Persisting any reference to this object is done by persisting
          the Id returned from this method. The Id returned may be
          different than the Id used to query this object. In this case,
          the new Id should be preferred over the old one for future
          queries.
  
          return: (osid.id.Id) - the ``Id``
          *compliance: mandatory -- This method must be implemented.*
          *implementation notes*: The ``Id`` is intended to be constant
          and persistent. A consumer may at any time persist the ``Id``
          for retrieval at any future time. Ideally, the Id should
          consistently resolve into the designated object and not be
          reused. In cases where objects are deactivated after a certain
          lifetime the provider should endeavor not to obliterate the
          object or its ``Id`` but instead should update the properties of
          the object including the deactiavted status and the elimination
          of any unwanted pieces of data. As such, there is no means for
          updating an ``Id`` and providers should consider carefully the
          identification scheme to implement.  ``Id`` assignments for
          objects are strictly in the realm of the provider and any errors
          should be fixed directly with the backend supporting system.
          Once an Id has been assigned in a production service it should
          be honored such that it may be necessary for the backend system
          to support Id aliasing to redirect the lookup to the current
          ``Id``. Use of an Id OSID may be helpful to accomplish this task
          in a modular manner.