def is_silva_content(self, content):
"""Is the content a Silva content ?
You can override this method in a subclass to change this behaviour.
"""
cls = content['instance']
return (ISilvaObject.implementedBy(cls) or
IVersion.implementedBy(cls))
def has_default_metadata(self, content):
"""Tell if the content should have default metadata set sets.
You can override this method in a subclass to change this behaviour.
"""
cls = content['instance']
return ((ISilvaObject.implementedBy(cls) and
not interfaces.IVersionedObject.implementedBy(cls)) or
IVersion.implementedBy(cls))
