code: def testToSequence(self):
      testing_lib.add_track_to_sequence(
          self.note_sequence,
          0,
          [
              (60, 100, 0.0, 4.0),
              (64, 100, 0.0, 3.0),
              (67, 100, 1.0, 2.0),
          ],
      )
      quantized_sequence = sequences_lib.quantize_note_sequence(
          self.note_sequence, steps_per_quarter=1
      )
      poly_seq = polyphony_lib.PolyphonicSequence(quantized_sequence)
      poly_seq_ns = poly_seq.to_sequence(qpm=60.0)
  
      # Make comparison easier
      poly_seq_ns.notes.sort(key=lambda n: (n.start_time, n.pitch))
      self.note_sequence.notes.sort(
          key=lambda n: (n.start_time, n.pitch)
      )
  
      self.assertEqual(self.note_sequence, poly_seq_ns)
  
imports: import copy
  from magenta.common import testing_lib
  from magenta.models.polyphony_rnn import polyphony_lib
  from note_seq import sequences_lib
  from note_seq import testing_lib
  from note_seq.protobuf import music_pb2
  import tensorflow.compat.v1
label_desc: Use image node_id 3 for calling the PolyphonyLibTest obj's underlying member method code with example usage: obj.testToSequence() without return types