class_docstr: Urmp training set.
class_docstr_tok: ["Urmp","training","set","."]
code: def default_file_pattern(self):
      if self.instrument_key == "all":
          file_pattern = "all_instruments_{}{}.tfrecord*".format(
              self.split, self.suffix
          )
      else:
          file_pattern = (
              "urmp_{}_solo_ddsp_conditioning_{}{}.tfrecord*".format(
                  self.instrument_key, self.split, self.suffix
              )
          )
  
      return os.path.join(self.base_dir, file_pattern)
  
imports: import os
  from absl import logging
  from ddsp.spectral_ops import CREPE_FRAME_SIZE
  from ddsp.spectral_ops import CREPE_SAMPLE_RATE
  from ddsp.spectral_ops import get_framed_lengths
  import gin
  import tensorflow.compat.v2
  import tensorflow_datasets
label_desc: Use image node_id 2 for calling the Urmp obj's underlying member method code with example usage: obj.default_file_pattern() and returns: os