code: func resourceVSphereDatastoreClusterApplySDRSConfig(d *schema.ResourceData, meta interface{}, pod *object.StoragePod) error {
  	// This is a no-op if there is no SDRS config changed
  	if !resourceVSphereDatastoreClusterHasSDRSConfigChange(d) {
  		log.Printf("[DEBUG] %s: No SDRS configuration attributes have changed", resourceVSphereDatastoreClusterIDString(d))
  		return nil
  	}
  
  	log.Printf("[DEBUG] %s: Applying SDRS configuration", resourceVSphereDatastoreClusterIDString(d))
  	client := meta.(*VSphereClient).vimClient
  	if err := viapi.ValidateVirtualCenter(client); err != nil {
  		return err
  	}
  
  	// Get the version of the vSphere connection to help determine what
  	// attributes we need to set
  	version := viapi.ParseVersionFromClient(client)
  
  	// Expand the SDRS configuration.
  	spec := types.StorageDrsConfigSpec{
  		PodConfigSpec: expandStorageDrsPodConfigSpec(d, version),
  	}
  
  	return storagepod.ApplyDRSConfiguration(client, pod, spec)
  }
docs: // resourceVSphereDatastoreClusterApplySDRSConfig applies the SDRS
  // configuration to a datastore cluster.