or download this
my @arr_methods = ([ \@fw, \&NT::FW, 'FW'], [\@vrf, \&NT::VRF, 'VRF'
+], [\@vlan, \&NT::VLAN, 'VLAN'], [ \@portchannel, \&NT::PORTCHANNEL,
+'PORTCHANNEL'] );
...
@{$_->[0]} = ($_->[1])->extract( &slurpFile($CFG{$CFG{$_->[2]}
+} ), %CFG);
}