code: func (o *ServiceControllerOptions) AddFlags(fs *pflag.FlagSet) {
  	if o == nil {
  		return
  	}
  
  	fs.Int32Var(&o.ConcurrentServiceSyncs, "concurrent-service-syncs", o.ConcurrentServiceSyncs, "The number of services that are allowed to sync concurrently. Larger number = more responsive service management, but more CPU (and network) load")
  }
docs: // AddFlags adds flags related to ServiceController for controller manager to the specified FlagSet.