public boolean isTagVdlAvailable(String documentationLink) {
        if (LangUtils.isEmpty(documentationLink)) {
            return false;
        }
        return getTags().containsKey(parseLink(documentationLink));
    }
Checks if the VDL (View Declaration Language) tag is available for the given documentation link.

@param documentationLink the documentation link to check.
@return true if the VDL tag is available, false otherwise.
primefaces-showcase/src/main/java/org/primefaces/showcase/view/app/TagLibrary.java