groovyImplicitTypes.add("java.math.BigDecimal");
        groovyImplicitTypes.add("java.math.BigInteger");

        // check that groovy is visible.
        try {
            getClass().getClassLoader().loadClass("groovy.lang.Closure");
        } catch (ClassNotFoundException e) {
            throw UncheckedException.throwAsUncheckedException(e);
        }
    }

    /**