This method is guaranteed to be called before any other lifecycle method (ie any of the other execute* methods on this interface. It is also guaranteed to be called before any expression in a page is evaluated.
For component-based frameworks, the component tree may not yet exist.
ViewControllerPhaseListenerState state = (ViewControllerPhaseListenerState) facesContext.getExternalContext().getRequestMap().get(ViewControllerPhaseListenerState.class.getName());
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