hi team when using LLMMultiSelector i m

hey @shere, RouterQueryEngine is quite new and we only added support for routing to a single option for now (i.e. via LLMSingleSelector`

support for multiple selection and then combining the response from them will be added soon!

@disiok got it thanks! is this going to integrate with langchain as a tool to be retrieved? also i'm trying to add a tool for an empty index as well but i don't know how to properly set the summary so that only if the data is not available in the index to use the empty tool? any thoughts?

# define tools
list_tool = QueryEngineTool.from_defaults(
query_engine=list_query_engine,
description='Useful for multiple questions',
)

vector_tool = QueryEngineTool.from_defaults(
query_engine=vector_query_engine,
description='Useful for answering 1-2 questions.',
)
# empty_tool = QueryEngineTool.from_defaults(
# query_engine=empty_query_engine,
# description='Useful for retrieving external knowledge and information not provided in the context.',
# )



query_engine = RouterQueryEngine(
selector=LLMSingleSelector.from_defaults(
service_context=service_context),
query_engine_tools=[
list_tool,
vector_tool
# ,
# empty_tool
]

)