@abc.abstractproperty
  def port_no(self):
    raise NotImplementedError()
Handles the set of marked lines being changed.
dataset/ETHPy150Open ucb-sts/sts/sts/entities/hosts.py/HostInterfaceAbstractClass.port_no--crossover with--dataset/ETHPy150Open enthought/traitsui/traitsui/wx/code_editor.py/SourceEditor._mark_lines_changed