code: def get_sessions(self, app_path=None):
          ''' Gets all currently active sessions for applications.
  
          Args:
              app_path (str, optional) :
                  The configured application path for the application to return
                  sessions for. If None, return active sessions for all
                  applications. (default: None)
  
          Returns:
              list[ServerSession]
  
          '''
          if app_path is not None:
              return self._tornado.get_sessions(app_path)
          all_sessions = []
          for path in self._tornado.app_paths:
              all_sessions += self._tornado.get_sessions(path)
          return all_sessionf get_sessions(self, app_path=None):
          ''' Gets all currently active sessions for applications.
  
          Args:
              app_path (str, optional) :
                  The configured application path for the application to return
                  sessions for. If None, return active sessions for all
                  applications. (default: None)
  
          Returns:
              list[ServerSession]
  
          '''
          if app_path is not None:
              return self._tornado.get_sessions(app_path)
          all_sessions = []
          for path in self._tornado.app_paths:
              all_sessions += self._tornado.get_sessions(path)
          return all_sessions
docs: Gets all currently active sessions for applications.
  
          Args:
              app_path (str, optional) :
                  The configured application path for the application to return
                  sessions for. If None, return active sessions for all
                  applications. (default: None)
  
          Returns:
              list[ServerSession]