Switches the page to @page_num.
Note that this will only be necessary in custom buttons, as the @assistant flow can be set with gtk_assistant_set_forward_page_func().
index of the page to switch to, starting from 0. If negative, the last page will be used. If greater than the number of pages in the @assistant, nothing will be done.
See Implementation
Switches the page to @page_num.
Note that this will only be necessary in custom buttons, as the @assistant flow can be set with gtk_assistant_set_forward_page_func().