code: def _get_index(x):
      if hasattr(x, "index"):
          return x.index
      else:
          # select last dimension for time index
          return pd.RangeIndex(x.shape[-1])
  
imports: import numpy
  import pandas
  from sktime.datatypes._convert_utils._coerce import _coerce_df_dtypes
  from sktime.datatypes._convert_utils._convert import _extend_conversions
  from sktime.datatypes._panel._registry import MTYPE_LIST_PANEL
  from sktime.utils.pandas import df_map
  from sktime.utils.validation._dependencies import _check_soft_dependencies
label_desc: Use image node_id 17 for calling a global function with example usage: _get_index(x) and returns: x, pd