code: func IsPVMigratable(pv *v1.PersistentVolume) bool {
  	for _, curPlugin := range inTreePlugins {
  		if curPlugin.CanSupport(pv) {
  			return true
  		}
  	}
  	return false
  }
docs: // IsPVMigratable tests whether there is migration logic for the given Persistent Volume