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package OO::SubModule; sub new { ... } ## You can say $self->_debug("booya") to do $self->{debug_cb}->("booya +") without it ending up in the call stack
## both apps $oosub = OO::SubModule->new({ ... ## Any occurrence of $self->_debug("booya") within OO::SubModule reall +y does _debug("booya") of the main app, this way ## Without getting in the call stack, right?