question: private boolean isRemoveAllVolumes ( ExportMask exportMask , List < URI > volumesToRemove ) { List < URI > volumesInMask = ExportMaskUtils . getVolumeURIs ( exportMask ) ; return volumesInMask . isEmpty ( ) || ( volumesInMask . containsAll ( volumesToRemove ) && ( volumesInMask . size ( ) == volumesToRemove . size ( ) ) ) ; }
target:  Returns true if the request is to remove all the volumes in the ExportMask.