text: """Legacy, DON'T USE
  """
  from utensor_cgen.frontend.tensorflow import GraphDefParser
  from utensor_cgen.logger import logger
  
  from .base import Transformer
  from .pipeline import TransformerPipeline
  
  try:
    from tensorflow.tools.graph_transforms import TransformGraph
  except ImportError:
    logger.warning("trying to import deprecated quantization transformer")
    TransformGraph = None
  
  
  __all__ = ['QuantizeTransformer']
  
  @TransformerPipeline.register_transformer
  class QuantizeTransformer(Transformer):
    METHOD_NAME = 'quantize'
    KWARGS_NAMESCOPE = '_quantize'
    APPLICABLE_LIBS = set(["tensorflow"])
  
    def transform(self, ugraph):
      if ugraph.lib_name != 'tensorflow':
        raise ValueError('only support tensorflow graph')
      graph_def = ugraph.graph_def
      if TransformGraph is None:
        raise RuntimeError("quantization is temporary not supported")
      quant_graph_def = TransformGraph(input_graph_def=graph_def,
                                       inputs=[],
                                       outputs=ugraph.output_nodes,
                                       transforms=["quantize_weights", "quantize_nodes"])
      return GraphDefParser(config={}).parse(
        quant_graph_def,
        output_nodes=ugraph.output_nodes
      )
  