TIEHASH DEBUGHASH=HASH(0x649f78)
FETCH DEBUGHASH=HASH(0x649f78) a
FIRSTKEY DEBUGHASH=HASH(0x649f78)
$VAR1 = {};

STORE DEBUGHASH=HASH(0x649f78) b=42
FIRSTKEY DEBUGHASH=HASH(0x649f78)
FETCH DEBUGHASH=HASH(0x649f78) b
NEXTKEY DEBUGHASH=HASH(0x649f78) b
$VAR1 = {
          'b' => 42
        };