code: def get_x_axis(ax):
      return ax._shared_axes["x"]
  
imports: from __future__ import annotations
  from typing import TYPE_CHECKING
  import numpy
  from pandas.core.dtypes.api import is_list_like
  import pandas
  from pandas import Series
  import pandas._testing
label_desc: Use image node_id 17 for calling a global function with example usage: get_x_axis(ax) and returns: ax