old_contents: import numpy as np
  
  from tardis.plasma.standard_plasmas import LegacyPlasmaArray
  
  '''
  def test_he_nlte_plasma(number_density, atomic_data, time_explosion,
      t_rad, w, j_blues):
      he_nlte_plasma = LegacyPlasmaArray(number_densities=number_density,
          atomic_data=atomic_data, time_explosion=time_explosion,
          helium_treatment='recomb-nlte')
      he_nlte_plasma.update_radiationfield(t_rad, w, j_blues, nlte_config=None)
      assert np.allclose(he_nlte_plasma.get_value(
          'ion_number_density').ix[2].ix[1], number_density.ix[2])
      assert np.all(he_nlte_plasma.get_value(
          'level_number_density').ix[2].ix[0].ix[0])==0.0
      assert np.allclose(he_nlte_plasma.get_value(
          'level_number_density').ix[2].sum(), number_density.ix[2])
  
  '''
subject: Remove commented out code from test_property_nlte.