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  1. or download this
    package Factory;

...

print($drone1->bar(), $/);  # Prints Drone
print($drone2->bar(), $/);  # Prints Drone::Subclass
  2. or download this
    package Factory;

...

print($drone1->bar(), $/);  # Prints Drone
print($drone2->bar(), $/);  # Prints Drone