Function script::script_module::host_import_module_dynamically

pub unsafe extern "C" fn host_import_module_dynamically(
    cx: *mut JSContext,
    reference_private: HandleValue,
    specifier: Handle<*mut JSObject>,
    promise: Handle<*mut JSObject>
) -> bool

https://html.spec.whatwg.org/multipage/#hostimportmoduledynamically(referencingscriptormodule,-specifier,-promisecapability)