code: def add_missing_phoneme(
      self, start, label_id, time, labels, segment, segments, skip=False
  ):
      segment.add(labels[start].start, time, label_id)
      labels[start].start = time
      return labels, segment, segments, skip
  
imports: import argparse
  import math
  import os
  import sys
  import music21
  from espnet2.fileio.score_scp import SingingScoreWriter, XMLReader
label_desc: Use image node_id 5 for calling the DataHandler obj's underlying member method code with example usage: obj.add_missing_phoneme(start, label_id, time, labels, segment, segments, skip) and returns: labels,  segment,  segments,  skip