retrieveAndGenerateStream   
  abstract suspend fun <T> retrieveAndGenerateStream(input: RetrieveAndGenerateStreamRequest, block: suspend (RetrieveAndGenerateStreamResponse) -> T): T
Queries a knowledge base and generates responses based on the retrieved results, with output in streaming format.
The CLI doesn't support streaming operations in Amazon Bedrock, including InvokeModelWithResponseStream.
This operation requires permission for the bedrock:RetrieveAndGenerate action.