code: def _validate_marker(s):
      try:
          return validate_int(s)
      except ValueError as e:
          try:
              return validate_string(s)
          except ValueError as e:
              raise ValueError(
                  "Supported markers are [string, int]"
              ) from e
  
imports: import ast
  from functools import lru_cache, reduce
  from numbers import Real
  import operator
  import os
  import re
  import numpy
  from matplotlib import _api, cbook
  from matplotlib.cbook import ls_mapper
  from matplotlib.colors import Colormap, is_color_like
  from matplotlib._fontconfig_pattern import parse_fontconfig_pattern
  from matplotlib._enums import JoinStyle, CapStyle
  from cycler import Cycler, cycler
label_desc: Use image node_id 8 for calling a global function with example usage: _validate_marker(s) and returns: validate_int, validate_string