code: def get_process_by_id(self, process_id):
          
          route_values = {}
          if process_id is not None:
              route_values['processId'] = self._serialize.url('process_id', process_id, 'str')
          response = self._send(http_method='GET',
                                location_id='93878975-88c5-4e6a-8abb-7ddd77a8a7d8',
                                version='5.1-preview.1',
                                route_values=route_values)
          return self._deserialize('Process', response)
docs: GetProcessById.
          [Preview API] Get a process by ID.
          :param str process_id: ID for a process.
          :rtype: :class:`<Process> <azure.devops.v5_1.core.models.Process>`