internal package Foswiki::Plugins::JQueryPlugin::EMPTY 
This is the perl stub for the jquery.empty plugin.
  ClassMethod new( $class, … ) 
Constructor
  ClassMethod init( $this ) 
Initialize this plugin by adding the required static files to the html header
  ClassMethod handleEMPTY( $this, $params, $topic, $web ) → $result 
Tag handler for 
%EMPTY%. You might need to add 
to 
Foswiki::Plugins::JQueryPlugin::initPlugin() the following:
  Foswiki::Func::registerTagHandler('EMPTY', \&handleEMPTY );
and also
sub handleEMPTY {
  my $session = shift;
  my $plugin = createPlugin('Empty', $session);
  return $plugin->handleEMPTY(@_) if $plugin;
  return '';
}