code: func (p *nfsProvisioner) ShouldProvision(claim *v1.PersistentVolumeClaim) bool {
  	// As long as the export limit has not been reached we're ok to provision
  	ok := p.checkExportLimit()
  	if !ok {
  		glog.Infof("export limit reached. skipping claim %s/%s", claim.Namespace, claim.Name)
  	}
  	return ok
  }
docs: // ShouldProvision returns whether provisioning should be attempted for the given
  // claim.