Fix CheckStyle violations and one more `isLambda()`` in the `RecipientListRouterSpec` Add `Assert` for method ambiguity to the `LambdaMessageProcessor` to be sure that we get deal only with the Function Interface impl
Fix CheckStyle violations and one more `isLambda()`` in the `RecipientListRouterSpec` Add `Assert` for method ambiguity to the `LambdaMessageProcessor` to be sure that we get deal only with the Function Interface impl