void (* undo) (WebKitWebView *web_view);
void (* redo) (WebKitWebView *web_view);
gboolean (* should_allow_editing_action) (WebKitWebView *web_view);
void (* undo) (WebKitWebView *web_view);
void (* redo) (WebKitWebView *web_view);
gboolean (* should_allow_editing_action) (WebKitWebView *web_view);