code: def time_mask(self, fill_value):
      self.sp_arr[self.sp_b_arr]
  
imports: import numpy
  import scipy.sparse
  import pandas
  from pandas import MultiIndex, Series, date_range
  from pandas.arrays import SparseArray
  from .pandas_vb_common import setup
label_desc: Use image node_id 2 for calling the GetItemMask obj's underlying member method code with example usage: obj.time_mask(fill_value) without return types