Function dynamic_import_callback 

pub fn dynamic_import_callback<'a>(
    scope: &mut HandleScope<'a>,
    _host_defined_options: Local<'a, Data>,
    resource_name: Local<'a, Value>,
    specifier: Local<'a, String>,
    _import_attributes: Local<'a, FixedArray>,
) -> Option<Local<'a, Promise>>