question: print all the levels of the structure in the standard output concode_field_sep int numberOfFrequentSequences concode_elem_sep String string concode_elem_sep List<List<Pattern>> levels concode_field_sep List<Pattern> getLevel concode_elem_sep int size concode_elem_sep String toStringToFile concode_elem_sep void addSequences concode_elem_sep void clear concode_elem_sep String toString concode_elem_sep void sort concode_elem_sep void addSequence concode_elem_sep int getLevelCount concode_elem_sep List<List<Pattern>> getLevels concode_elem_sep void delete
target: void function ( ) { System . out . println ( toString ( ) ) ; }