code: def dump(self):
      if not self.is_legal():
          raise ValueError(
              "Data sample "
              + str(self.data)
              + " is not legal, their length of text is 0"
          )
      return {
          "source": self.source.text,
          "target": self.target.text,
          "sample_id": self.sample_id,
      }
  
file_path: textflint/textflint/input/component/sample/nmt_sample.py
imports: from .sample import Sample
  from ..field import TextField
label_desc: Use image node_id 6 for calling the NMTSample obj's underlying member method code with example usage: obj.dump() and returns: dict