static void check(boolean ok, String message) {
		if (!ok) {
			throw new JsonParseException(message);
		}
	}
Returns a Catalog containing all the aliases from local catalog files merged
into one. This follows the system where aliases that are "nearest" have
priority.

@param includeImplicits Determines if the implicit catalogs should be merged
                        or not
@return a Catalog object
src/main/java/dev/jbang/catalog/Catalog.java