code: func (ipvspc IPVSProxierCheck) Check() (warnings, errors []error) {
  	ipsetInterface := utilipset.New(ipvspc.exec)
  	kernelHandler := ipvs.NewLinuxKernelHandler()
  	if _, err := ipvs.CanUseIPVSProxier(kernelHandler, ipsetInterface); err != nil {
  		return nil, append(errors, err)
  	}
  	return nil, nil
  }
docs: // Check determines if IPVS proxier can be used or not