Is it possible to flush the contents of a POE::Wheel::FollowTail wheel?

I am using one to monitor a file that is left with a non '\n' terminated 
line at when the process that creates it is finished.

What I'd like to be able to do before closing is somthing like:

sub finish_file {
   my $heap = $_[HEAP];
   $heap-> {wheel}->flush;  # this should generate an InputEvent with any 
dangling bits left in the buffer.

   # do other stuff here
}

Or even better:

 $heap-> {follow_tail} = POE::Wheel::FollowTail->new(
        Filename   =>  $logfile,
        InputEvent =>  'got_line',
        ErrorEvent =>  'got_error',
        FlushAtClose =>  1,    # Enable an automatic buffer flush as the 
wheel is destroyed.
    );

TIA,
--Mark