parameters: (self, req: HistoryRequest)
docstring: Query bar history data.
docstring_summary: Query bar history data.
docstring_tokens: Query bar history data .
function: def query_history(self, req: HistoryRequest) -> List[BarData]:
          """
          Query bar history data.
          """
          pass
function_tokens: def query_history ( self , req : HistoryRequest ) -> List [ BarData ] : pass