code: def build_filter(self):
      if self.cfg is None:
          return super(DateFilter, self).handle_missing(None)
  
      start, end = (self.cfg.get(p) for p in ["start", "end"])
      fltr = dict(
          start=start,
          end=end,
          meta={
              "column": self.column,
              "classification": self.classification,
              "type": self.cfg["type"],
          },
      )
      queries = []
      if start:
          queries.append(
              "{} >= '{}'".format(build_col_key(self.column), start)
          )
      if end:
          queries.append(
              "{} <= '{}'".format(build_col_key(self.column), end)
          )
      if len(queries) == 2 and start == end:
          queries = [
              "{} == '{}'".format(build_col_key(self.column), start)
          ]
      if not len(queries):
          return super(DateFilter, self).handle_missing(None)
      fltr["query"] = " and ".join(queries)
      return super(DateFilter, self).handle_missing(fltr)
  
imports: import json
  import numpy
  import pandas
  import dtale.global_state
  from dtale.utils import classify_type, find_dtype, format_data, make_list
  from dtale.query import build_col_key
label_desc: Use image node_id 2 for calling the DateFilter obj's underlying member method code with example usage: obj.build_filter() and returns: super, super, super