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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def _setup_services(self):
 """ Construct a ContextService and a thread to service requests for it arriving from worker processes. """

        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)