question: private File checkBaseline ( File baselineParentDir ) throws IOException { File baselineDir = null ; if ( null != baselineParentDir ) { baselineDir = getBackupDir ( baselineParentDir ) ; if ( ! baselineDir . exists ( ) ) { baselineDir = findBaselineForThisMember ( baselineParentDir ) ; } if ( null != baselineDir ) { File incompleteBackup = new File ( baselineDir , INCOMPLETE_BACKUP ) ; if ( incompleteBackup . exists ( ) ) { baselineDir = null ; } } } return baselineDir ; }
target:  Performs a sanity check on the baseline directory for incremental backups. If a baseline directory exists for the member and there is no INCOMPLETE_BACKUP file then return the data stores directory for this member.