code: def _make_column_names(column_count):
      return [f"var_{i}" for i in range(column_count)]
  
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 19 for calling a global function with example usage: _make_column_names(column_count) and returns: unknown