Function launch_kernel 

pub fn launch_kernel<R: Runtime, Alg: Algorithm>(
    client: &ComputeClient<R>,
    input: &MatmulInputHandleRef<'_, R>,
    out_grad: &MatmulInputHandleRef<'_, R>,
    weight_grad: &TensorHandleRef<'_, R>,
    problem: ConvolutionProblem,
    blueprint_strategy: &BlueprintStrategy<RuntimeArgs, Alg::Routine>,
    dtypes: MatmulElems,
) -> Result<(), ConvSetupError>
where
    Alg::Args: ConcreteArgs<Alg::Routine>,