old_contents: from mbuild.atom import Atom
  from mbuild.bond import Bond
  from mbuild.box import Box
  from mbuild.coordinate_transform import *
  from mbuild.compound import *
  from mbuild.mask import *
  from mbuild.packing import *
  from mbuild.port import Port
  from mbuild.recipes import *
  
  from mbuild.formats import *
  
  # For using MDTraj's interactive IPython WebGL widget
  try:
      __IPYTHON__
  except NameError:
      in_ipython = False
  else:
      from mdtraj.html import enable_notebook
      enable_notebook()
  
  from mbuild.version import version
  
new_contents: from mbuild.atom import Atom
  from mbuild.bond import Bond
  from mbuild.box import Box
  from mbuild.coordinate_transform import *
  from mbuild.compound import *
  from mbuild.mask import *
  from mbuild.packing import *
  from mbuild.port import Port
  from mbuild.recipes import *
  
  from mbuild.formats import *
  
  from mbuild.version import version
  
subject: Remove widget __init__ for MDTraj.