def get_key_resource_id(self):
return Id(self._my_map['<STR_LIT>'])<EOL>
Gets the ``Id`` of the key resource of this entry.

        The key resource may be a student or other applicable key to
        identify a row of grading entries.

        return: (osid.id.Id) - ``Id`` of the key resource
        *compliance: mandatory -- This method must be implemented.*