I think you want something like the below: 
    sub new {
        my $class = shift;
        my $obj = $class->SUPER::new( "AuthorizeNet"  );
        # rebless or do whatever with $obj
        return $obj;
    }

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In reply to Re: subclass and overridden constructor by simonm
in thread subclass and overridden constructor by geektron

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