code: def get_support_methods(self):
      return ["minmax", "max", "standard"]
  
file_path: nlpaug/nlpaug/model/audio/normalization.py
imports: import numpy
  from nlpaug.model.audio import Audio
label_desc: Use image node_id 2 for calling the Normalization obj's underlying member method code with example usage: obj.get_support_methods() and returns: list