public static Object evaluateVariableExpression(final String with) {
        final Object withValue;
        if ( with.startsWith("${") ) {
            final String navigateExpression = stripVariablePlaceholder(with);
            withValue = GlobalTestContext.getInstance().evaluateVariableNavigation(navigateExpression);
        } else if ( "null".equalsIgnoreCase(with) ) {
            withValue = null;
        } else {
            withValue = with;
        }
        return withValue;
    }