List < List < SequentialPattern >> function ( ) { return levels ; }
get a list of list of sequential patterns such that at position i , there is a list of sequential patterns containing i items . concode_field_sep List<List<SequentialPattern>> levels concode_elem_sep String name concode_elem_sep int sequenceCount concode_field_sep List<SequentialPattern> getLevel concode_elem_sep void printSequencesFrequentes concode_elem_sep String toString concode_elem_sep void addSequence concode_elem_sep int getLevelCount