code: def valid_approaches(self):
      return "post_training_static_quant", "post_training_dynamic_quant"
  
file_path: BigDL/python/nano/src/bigdl/nano/deps/neural_compressor/core/quantization.py
imports: from bigdl.nano.utils.common import invalidInputError
  from neural_compressor.conf.config import Quantization_Conf
  from neural_compressor.experimental import Quantization, common
label_desc: Use image node_id 8 for calling the BaseQuantization obj's underlying member method code with example usage: obj.valid_approaches() and returns: str,  str