Function webkit2gtk_webextension_sys::webkit_web_extension_send_message_to_context_finish

pub unsafe extern "C" fn webkit_web_extension_send_message_to_context_finish(
    extension: *mut WebKitWebExtension,
    result: *mut GAsyncResult,
    error: *mut *mut GError
) -> *mut WebKitUserMessage

Available on crate feature v2_28 only.