code: def _get_plain_text_schema(self, dtypes):
      return {
          "g": {"type": "plaintext", "stride": 1, "dtype": dtypes["g"]},
          "h": {"type": "plaintext", "stride": 1, "dtype": dtypes["h"]},
          "cnt": {
              "type": "plaintext",
              "stride": 1,
              "dtype": dtypes["cnt"],
          },
      }
  
imports: import typing
  import torch
  from typing import Dict
  from fate.arch.histogram import HistogramBuilder, DistributedHistogram
  from fate.ml.ensemble.learner.decision_tree.tree_core.decision_tree import Node
  from typing import List
  import numpy
  from fate.arch.dataframe import DataFrame
  from fate.arch import Context
  import logging
label_desc: Use image node_id 2 for calling the SBTHistogramBuilder obj's underlying member method code with example usage: obj._get_plain_text_schema(dtypes) and returns: dict