function StartResolverWithLambda(fn: LambdaResolverFn): void

type LambdaResolverFn = (input: ResolverInput) => Promise<ResolverOutput>;

def start_resolver_with_fn(fn: Callable[[ResolverInput], Awaitable[ResolverOutput]]) -> None

async def resolver(input: ResolverInput) -> ResolverOutput:
    # Your logic here
    return ResolverOutput(path="...", content="...")

start_resolver_with_fn(resolver)

void CyanEngine.StartResolver(string[] args, Func<ResolverInput, Task<ResolverOutput>> fn)

CyanEngine.StartResolver(
    args,
    async (ResolverInput input) =>
        {
            return new ResolverOutput("path", "content");
        }
    );