code: def getvalue(self) -> list[t.Any]:
      items = sorted(self.data.items(), key=itemgetter(0))
      value: list[t.Any] = []
      for n, (key, val) in enumerate(items):
          if key != n:
              assert key > n
              missing_key = "%s[%d]" % (self.flat_key, n)
              raise ValueError("missing key %r" % missing_key)
          value.append(val)
      return value
  
imports: from __future__ import absolute_import
  from __future__ import annotations
  import re
  import sys
  import typing
  from operator import itemgetter
label_desc: Use image node_id 1 for calling the _list_holder obj's underlying member method code with example usage: obj.getvalue() and returns: value