$ perl -I . -MWidget -de 0

Loading DB routines from perl5db.pl version 1.57
Editor support available.

Enter h or 'h h' for help, or 'man perldebug' for more help.

main::(-e:1):   0
  DB<1> $red = Widget->make_color_widget( red => () );

  DB<2> $blue = Widget->make_color_widget( blue => () );

  DB<3> x $red->my_color
0  'red'
  DB<4> x $blue->my_color
0  'blue'