if( !$args{NoLWP} && ! _use( 'URI') && ! _use( 'URI::File') && ! _use( 'LWP'))
      { $self->{twig_ext_ent_handler}= \&XML::Parser::initial_ext_ent_handler }
    elsif( $args{NoXxe})
      { $self->{twig_ext_ent_handler}= 
          sub { my($xp, $base, $path) = @_; $xp->{ErrorMessage}.= "cannot use entities in document when the no_xxe option is on"; return undef; }; 
      }
    else
      { $self->{twig_ext_ent_handler}= \&XML::Parser::file_ext_ent_handler }