class_docstr: POS Sample class to hold the necessary info and provide atomic operations.
docstr: Check rare data format.
docstr_tok: ["Check","rare","data","format","."]
code: def check_data(self, data):
      r"""
      Check rare data format.
  
      """
      assert "x" in data and isinstance(
          data["x"], list
      ), "x should be in data, and the type of x should be list"
      assert "y" in data and isinstance(
          data["y"], list
      ), "y should be in data, and the type of y should be list"
  
file_path: textflint/textflint/input/component/sample/pos_sample.py
imports: from .sample import Sample
  from ..field import ListField, TextField
label_desc: Use image node_id 4 for calling the POSSample obj's underlying member method code with example usage: obj.check_data(data) without return types