question: public Map < URI , List < URI > > addSourceVolumeFullCopies ( ) { List < URI > fullCopies = Lists . newArrayList ( ) ; Map < URI , List < URI > > fullCopiesMap = new HashMap < > ( ) ; for ( URI volumeId : uris ( volumeIds ) ) { List < URI > volumeFullCopies = getFullCopies ( volumeId ) ; fullCopies . addAll ( volumeFullCopies ) ; fullCopiesMap . put ( volumeId , volumeFullCopies ) ; } if ( ! fullCopies . isEmpty ( ) ) { BlockStorageUtils . addVolumesToConsistencyGroup ( consistencyGroup , fullCopies ) ; } return fullCopiesMap ; }
target:  Adds all source volumes' full copies to the consistency group