$r->add_output_filter using core filters

[Fred Moyer]

Greetings,

Is it possible to dynamically add core output filters such as INCLUDE with
$r->add_output_filter('INCLUDE')?  The docs indicate that
PerlSetOutputFilter INCLUDE is ok, but it looks like $r->add_output_filter
is restricted to perl handlers.  I tried add_output_filter with INCLUDE,
but received an error saying no such handler.

Thanks,

Fred