question: public static boolean hasTaxonomyInfo ( SequencesReader reader ) { final File taxonFile = new File ( reader . path ( ) , TAXONOMY_FILE ) ; final File mappingFile = new File ( reader . path ( ) , TAXONOMY_TO_SEQUENCE_FILE ) ; if ( taxonFile . exists ( ) && mappingFile . exists ( ) ) { return true ; } else if ( taxonFile . exists ( ) || mappingFile . exists ( ) ) { throw new NoTalkbackSlimException ( "Reference SDF does not contain both taxonomy and sequences lookup" ) ; } else { return false ; } }
target:  Returns true if the supplied reader contains taxonomy information