code: func modifyContainerPIDNamespaceOverrides(version *semver.Version, hc *dockercontainer.HostConfig, podSandboxID string) {
  	if version.LT(semver.Version{Major: 1, Minor: 26}) && strings.HasPrefix(string(hc.PidMode), "container:") {
  		hc.PidMode = ""
  	}
  }
docs: // modifyPIDNamespaceOverrides implements a temporary override for the default PID namespace sharing for Docker:
  //     1. Docker engine prior to API Version 1.24 doesn't support attaching to another container's
  //        PID namespace, and it didn't stabilize until 1.26. This check can be removed when Kubernetes'
  //        minimum Docker version is at least 1.13.1 (API version 1.26).
  // TODO(verb): remove entirely once these two conditions are satisfied