vars.add(new ExprLookup.Variable("String", org.apache.commons.lang3.StringUtils.class));
vars.add(new ExprLookup.Variable("Util", new Utility("Hello")));
vars.add(new ExprLookup.Variable("System", "Class:java.lang.System"));
XMLConfiguration config = new XMLConfiguration();
FileHandler handler = new FileHandler(config);
handler.load(TEST_FILE);
config.setLogger(log);
ExprLookup lookup = new ExprLookup(vars);
lookup.setInterpolator(config.getInterpolator());
lookup.setLogger(log);
String str = lookup.lookup(PATTERN1);