public abstract bool TryGetContract<TContract>([NotNullWhen(true)] out TContract contract, [NotNullWhen(false)] out System.Exception? failureException) where TContract : IContract;

    public TContract GetContract<TContract>() where TContract : IContract
    {
        if (!TryGetContract(out TContract contract, out System.Exception? failureException))
        {
            throw failureException ?? new ContractMissingException(TContract.Name);

        int hr = contractLocator.GetContractDescriptor(&contractAddress);
        if (hr != 0)
        {
            throw new InvalidOperationException(
                $"{nameof(ICLRContractLocator)} failed to fetch the contract descriptor with HRESULT: 0x{hr:x}.");
        }

    /// <summary>
    /// Attempts to get an instance of the requested contract for the target.
    /// </summary>
    /// <typeparam name="TContract">The contract type to retrieve.</typeparam>
    /// <param name="contract">
    /// When this method returns <see langword="true"/>, contains the requested contract instance; otherwise, <see langword="null"/>.
    /// </param>
    /// <param name="failureException">
    /// When this method returns <see langword="false"/>, contains the exception that describes why the contract could not be retrieved; otherwise, <see langword="null"/>.
    /// </param>
    /// <returns>
    /// <see langword="true"/> if the requested contract is present and was retrieved successfully; <see langword="false"/> if the contract is not present or registered"/>.
    /// </returns>
    public abstract bool TryGetContract<TContract>([NotNullWhen(true)] out TContract contract, [NotNullWhen(false)] out System.Exception? failureException) where TContract : IContract;

        // DBI-only in-box contract: used by the DacDbi path (Legacy/Dbi/DacDbiImpl.cs).
        // Since cDAC is all-or-nothing for some tools debugger, a target either
        // exposes a fully serviceable set of contracts, or we fall back/fail.
        Validate<IRuntimeMutableTypeSystem>(registry); // DacDbiImpl.cs (edit-and-continue mutable type system)

        // GCInfo's creator reads RuntimeInfo from target memory. Advertise GCInfo but omit RuntimeInfo:
        // TryValidate must succeed (a creator is registered) without invoking it, whereas a real
        // GetContract would chain into RuntimeInfo and fail.
        TargetTestHelpers targetTestHelpers = new(arch);