from zope.interface import Interface, Attribute

class IMembraneTypeEvent(Interface):
    """
    Base interface for membrane type related events.
    """
    tool = Attribute("Tool")
    portal_type = Attribute("Portal Type")

class IMembraneTypeRegisteredEvent(IMembraneTypeEvent):
    """
    Interface for MembraneTypeRegisteredEvents.
    """

class IMembraneTypeUnregisteredEvent(IMembraneTypeEvent):
    """
    Interface for MembraneTypeUnregisteredEvents.
    """
