mount/unmount datastore and attach/detachLUN with vCO

Hi,

    
We want to mount/unmount datastore and attach/detatchLUN in vCenter with help of vCO workflows.

For unmounting datastore and detatching LUNs I found a scripting methods unmountvmfsvolume(), detachScsiLun() respectively.

Are these correct methods?  If yes, these methods accept lunuuid and vmfsuuid as a parameter. From where I can get these parameters?

Regards,

Shubhada