[BUG] [typescript-axios] Missing import for ActionResult<IDictionary<string, IEnumerable<QueryResponse>>>

Bug Report Checklist

• Have you provided a full/minimal spec to reproduce the issue?
• Have you validated the input using an OpenAPI validator (example)?
• Have you tested with the latest master to confirm the issue still exists?
• Have you searched for related issues/PRs?
• What's the actual output vs expected output?
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Description

When a C# controller action returns ActionResult<IDictionary<string, IEnumerable<QueryResponse>>>
And a web client is generated using the typescript-axios generator
Then the generated implementation of the controller is missing an import to QueryResponse
https://github.com/szszoke/OpenAPIBadTS

Code for QueryResponse is properly generated, it is just not imported.

The relevant file is https://github.com/szszoke/OpenAPIBadTS/blob/main/web_client/api/weather-forecast-api.ts

The same output is generated using the latest docker image, which can be seen my running docker build . in the root directory of the demo repository.

openapi-generator version

5.1.0

OpenAPI declaration file content or url

https://github.com/szszoke/OpenAPIBadTS/blob/main/swagger.json

Generation Details

Minimal project to trigger the bug:

https://github.com/szszoke/OpenAPIBadTS

Steps to reproduce

1. git clone https://github.com/szszoke/OpenAPIBadTS
2. cd OpenAPIBadTS
3. dotnet restore
4. dotnet build
5. npm install
6. npm run trigger-bug

Observe that the last step, where the generated client is compiled via the TypeScript compiler, fails due to the missing import of QueryResponse.

The expected output would be that QueryResponse is imported in api/weather-forecast-api.ts. The actual output is that it is not imported.

Clone OpenAPIBadTS and run the listed .NET and npm steps, especially npm run trigger-bug, to reproduce the TypeScript compilation failure. Compare the generated web_client/api/weather-forecast-api.ts with swagger.json and trace the typescript-axios generator's import handling; done means QueryResponse is imported and the generated client compiles.