code: def _setup_services(self):
          
          self.pool = mitogen.service.Pool(
              router=self.router,
              services=[
                  mitogen.service.FileService(router=self.router),
                  mitogen.service.PushFileService(router=self.router),
                  ansible_mitogen.services.ContextService(self.router),
                  ansible_mitogen.services.ModuleDepService(self.router),
              ],
              size=getenv_int('MITOGEN_POOL_SIZE', default=32),
          )
          LOG.debug('Service pool configured: size=%d', self.pool.size)
docs: Construct a ContextService and a thread to service requests for it
          arriving from worker processes.