attribute
to object
# Associate an `attribute` to `object`
fun set_object_attribute(object: O, attribute: A) do
attributes.add attribute
objects.add object
if not objects_attributes.has_key(object) then
objects_attributes[object] = new HashSet[A]
end
objects_attributes[object].add attribute
end
lib/fca/fca.nit:96,2--104,4