Description of the false positive

NRT attributes appear to be ignored by CodeQL. This results in lots of noise as we have to explicitly mark each point of use as a false positive and so safe.

Code samples or links to source code

      if (TryConvertContractState(tradingPhase, state, out Models.ContractState? contractState))
            return contractState.Value;

when it is defined as:

    private static bool TryConvertContractState(
        string tradingPhase, string state,
        [NotNullWhen(true)] out PersistedModels.ContractState? cdmState)
    {}

URL to the alert on GitHub code scanning (optional)

Private Repo, but the view query source goes to: https://github.com/github/codeql/blob/aa3000df1310b332ba1c84afec3bacb0aeb4dbbd/csharp/ql/src/CSI/NullMaybe.ql