Function wasmtime_component_instance_get_func 

#[unsafe(no_mangle)]
pub unsafe extern "C" fn wasmtime_component_instance_get_func(
    instance: &Instance,
    context: WasmtimeStoreContextMut<'_>,
    export_index: &wasmtime_component_export_index_t,
    func_out: &mut Func,
) -> bool