hyperledger-solang_solang/tests/contract_testcases/substrate/structs/parse_structs_16.sol

abstract contract AddressTree {
    struct MapTree {
        mapping(uint256 => MapTree) Items; // OK
    }
    struct ArrayTreeDynamic {
        ArrayTreeDynamic[] Arr; // OK
    }
    struct ArrayTreeFixed {
        ArrayTreeFixed[2] Arr; // Recursive struct definision
    }
}