gtk:stack-set-visible-child-full (stack name transition)

stack -- a gtk:stack widget
name -- a string with the name of the child page to make visible
transition -- a value of the gtk:stack-transition-type enumeration to use

Makes the child page with the given name visible. Note that the child page has to be visible itself, see the gtk:widget-visible function, in order to become the visible child page of the stack.