Function webkit2gtk_sys::webkit_web_view_run_javascript_in_world

pub unsafe extern "C" fn webkit_web_view_run_javascript_in_world(
    web_view: *mut WebKitWebView, 
    script: *const c_char, 
    world_name: *const c_char, 
    cancellable: *mut GCancellable, 
    callback: GAsyncReadyCallback, 
    user_data: gpointer
)

This is supported on crate feature v2_22 only.