Function webkit2gtk_sys::webkit_user_content_manager_register_script_message_handler_with_reply

pub unsafe extern "C" fn webkit_user_content_manager_register_script_message_handler_with_reply(
    manager: *mut WebKitUserContentManager,
    name: *const c_char,
    world_name: *const c_char
) -> gboolean

Available on crate feature v2_40 only.