code: def _resolve_foreach_data(self) -> "SeqOrMap":
      try:
          iterable = self.context.resolve(
              self.foreach_data, unwrap=False
          )
      except (ContextError, ParseError) as exc:
          format_and_raise(
              exc, f"'{self.where}.{self.name}.foreach'", self.relpath
          )
  
      # foreach data can be a resolved dictionary/list.
      self._check_is_map_or_seq(iterable)
      # foreach stages will have `item` and `key` added to the context
      # so, we better warn them if they have them already in the context
      # from the global vars. We could add them in `set_temporarily`, but
      # that'd make it display for each iteration.
      self._warn_if_overwriting(self._inserted_keys(iterable))
      return iterable
  
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 4 for calling the ForeachDefinition obj's underlying member method code with example usage: obj._resolve_foreach_data() and returns: iterable