code: def holes(cls, dataset):
      holes = []
      if not len(dataset.data):
          return holes
      col = cls.geo_column(dataset.data)
      series = dataset.data[col]
      return [geom_to_holes(geom) for geom in series]
  
imports: import sys
  from collections import defaultdict
  import numpy
  import pandas
  from ..dimension import dimension_name
  from ..util import isscalar, unique_array, unique_iterator
  from .interface import DataError, Interface
  from .multipath import MultiInterface, ensure_ring
  from .pandas import PandasInterface
label_desc: Use image node_id 12 for calling the SpatialPandasInterface obj's underlying member method code with example usage: obj.holes(cls, dataset) and returns: unknown, holes