old_contents: from .staging_error import StagingError
  
  extent = {}
  """The {name: collection} dictionary."""
  
  def add(*collections):
      """
      Adds the given :class:`qipipe.staging.collection.Collection`s to the
      list of known collections.
      
      :param collections: the collection objects to add
      """
      for coll in collections:
          extent[coll.name] = coll
  
  
  def with_name(name):
      """
      :param name: the image collection name
      :return: the corresponding :class:`qipipe.staging.collection.Collection`
      :raise StagingError: if the collection is not recognized
      """
      coll = extent.get(name, None)
      if not coll:
          raise StagingError("The AIRC collection name is not recognized: %s" %
                             name)
  
      return coll
  
new_contents: from .staging_error import StagingError
  
  extent = {}
  """The {name: collection} dictionary."""
  
  def add(*collections):
      """
      Adds the given :class:`qipipe.staging.collection.Collection`s to the
      list of known collections.
      
      :param collections: the collection objects to add
      """
      for coll in collections:
          extent[coll.name] = coll
  
  
  def with_name(name):
      """
      :param name: the image collection name
      :return: the corresponding :class:`qipipe.staging.collection.Collection`
      :raise StagingError: if the collection is not recognized
      """
      coll = extent.get(name, None)
      if not coll:
          raise StagingError("The collection name is not recognized: %s" %
                             name)
  
      return coll
  
subject: Remove reference to OHSU.