code: def resolve_one(self, name: str):
      group, key = split_group_name(name)
  
      if not self._has_group_and_key(group, key):
          raise EntryNotFound(f"Could not find '{name}'")
  
      # all of the checks for `key` not being None for
      # `ForeachDefinition`/`MatrixDefinition`
      # and/or `group` not existing in the `interim`, etc. should be
      # handled by the `self.has_key()` above.
      definition = self.definitions[group]
      if isinstance(definition, EntryDefinition):
          return definition.resolve()
  
      assert key
      return definition.resolve_one(key)
  
imports: import logging
  import os
  from collections.abc import Mapping, Sequence
  from copy import deepcopy
  from itertools import product
  from typing import TYPE_CHECKING, Any, Dict, List, NamedTuple, Optional, Tuple, Type, Union
  from funcy import collecting, first, isa, join, reraise
  from dvc.exceptions import DvcException
  from dvc.log import logger
  from dvc.parsing.interpolate import ParseError
  from dvc.utils.objects import cached_property
  from .context import Context, ContextError, KeyNotInContext, MergeError, Node, VarsAlreadyLoaded
  from .interpolate import check_recursive_parse_errors, is_interpolated_string, recurse, to_str
label_desc: Use image node_id 2 for calling the DataResolver obj's underlying member method code with example usage: obj.resolve_one(name) and returns: definition, definition