code: func (c *ContainerServer) LookupSandbox(idOrName string) (*sandbox.Sandbox, error) {
  	if idOrName == "" {
  		return nil, fmt.Errorf("container ID or name should not be empty")
  	}
  
  	podID, err := c.podNameIndex.Get(idOrName)
  	if err != nil {
  		if err == registrar.ErrNameNotReserved {
  			podID = idOrName
  		} else {
  			return nil, err
  		}
  	}
  
  	return c.getSandboxFromRequest(podID)
  }
docs: // LookupSandbox returns the pod sandbox with the given name or full or partial id