Function call_query 

pub fn call_query<A, S, Q>(
    instance: &mut Instance<A, S, Q>,
    env: &Env,
    msg: &[u8],
) -> VmResult<ContractResult<QueryResponse>>
where
    A: BackendApi + 'static,
    S: Storage + 'static,
    Q: Querier + 'static,