my $response = $self->transport->send_receive(
        context  => $self, # this is provided for context
        endpoint => $self->endpoint,
        action   => scalar($self->on_action->($serializer->uriformethod($_[0]))),
                # leave only parameters so we can later update them if required
        envelope => $serializer->envelope(method => shift, @_),
        encoding => $serializer->encoding,
        parts    => @{$self->packager->parts} ? $self->packager->parts : undef,
    );

##</code><code>##

    return $response if $self->outputxml;