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  1. or download this
    /* generated by h2xs -c Scalar::RefCount */
#include "EXTERN.h"
...
OUTPUT:
    RETVAL
  2. or download this
    use Test::More tests => 6;
BEGIN { use_ok('Scalar::RefCount') };
...
is(Scalar::RefCount::refcount($a),4, 'return 4');
}
is(Scalar::RefCount::refcount($a),3, 'return 3');