question: private boolean isNativeVolumeExpansionSupported ( Volume vplexVolume , Long newSize ) { boolean useNativeVolumeExpansion = true ; StringSet assocVolumeIds = vplexVolume . getAssociatedVolumes ( ) ; if ( null == assocVolumeIds ) { s_logger . warn ( "VPLEX volume {} has no backend volumes. It was probably ingested 'Virtual Volume Only'." , vplexVolume . forDisplay ( ) ) ; useNativeVolumeExpansion = false ; } else { for ( String assocVolumeId : assocVolumeIds ) { Volume assocVolume = _permissionsHelper . getObjectById ( URI . create ( assocVolumeId ) , Volume . class ) ; try { super . verifyVolumeExpansionRequest ( assocVolume , newSize ) ; } catch ( Exception e ) { useNativeVolumeExpansion = false ; break ; } } } return useNativeVolumeExpansion ; }
target:  Determines if the VPlex volume can be expanded by natively expanding the backend volumes.