The default_consumer_admin attribute is a readonly attribute
that maintains a reference to the default ConsumerAdmin
instance associated with the target EventChannel instance.
The default_filter_factory attribute is a readonly attribute
that maintains an object reference to the default factory to be
used by the EventChannel instance with which it is associated for
creating filter objects.
The default_supplier_admin attribute is a readonly attribute
that maintains a reference to the default SupplierAdmin
instance associated with the target EventChannel instance.
Interfaces define a new scope, but since we can't do that
in Java, this kind of scope is called a 'pseudo scope' and
is just prepended to the interface name