Type Alias ResolveOperation<D, P, M>

ResolveOperation:
    | (D extends { paths: infer Paths } ? OperationAt<Paths, P, M> : never)
    | (
        D extends { webhooks: infer Webhooks }
            ? OperationAt<Webhooks, P, M>
            : never
    )

Locate the Operation Object for path/method across both paths and webhooks. The OpenAPI 3.1 spec assigns webhooks the same Path Item shape as paths entries, so structural inference is identical once the operation is resolved.