code: def convert_to_index_sliceable(obj, key):
      
      idx = obj.index
      if isinstance(key, slice):
          return idx._convert_slice_indexer(key, kind='getitem')
  
      elif isinstance(key, str):
  
          # we are an actual column
          if obj._data.items.contains(key):
              return None
  
          # We might have a datetimelike string that we can translate to a
          # slice here via partial string indexing
          if idx.is_all_dates:
              try:
                  return idx._get_string_slice(key)
              except (KeyError, ValueError, NotImplementedError):
                  return None
  
      return None
docs: if we are index sliceable, then return my slicer, otherwise return None