old_contents: """
  Application helpers for OPAL
  """
  class OpalApplication(object):
      schema_module = None
      flow_module   = None
  
  def get_app():
      """
      Return the current Opal Application
      """
      return OpalApplication.__subclasses__()[0]
  
new_contents: """
  Application helpers for OPAL
  """
  class OpalApplication(object):
      schema_module = None
      flow_module   = None
      javascripts   = []
      actions       = []
  
  def get_app():
      """
      Return the current Opal Application
      """
      return OpalApplication.__subclasses__()[0]
  
subject: Add new properties to application base class