public boolean restoreLastMapFromArchive ( ) { boolean success = false ; List < Map < Object , Object > > object = null ; if ( oldBlockHierarchy . size ( ) > 0 ) { object = oldBlockHierarchy . remove ( oldBlockHierarchy . size ( ) - 1 ) ; if ( object != null ) { working = object ; success = true ; } } return success ; }
restore the last block hierarchy variable map from archive to working .