class_docstr: Creates stretched versions of the input NoteSequence.
class_docstr_tok: ["Creates","stretched","versions","of","the","input","NoteSequence","."]
code: def transform(self, input_object):
      note_sequence = input_object
      return [
          sequences_lib.stretch_note_sequence(
              note_sequence, stretch_factor
          )
          for stretch_factor in self._stretch_factors
      ]
  
imports: import copy
  from magenta.pipelines import pipeline
  from magenta.pipelines import statistics
  from note_seq import constants
  from note_seq import sequences_lib
  from note_seq.protobuf import music_pb2
  import tensorflow.compat.v1
label_desc: Use image node_id 2 for calling the StretchPipeline obj's underlying member method code with example usage: obj.transform(input_object) and returns: unknown