public static ExpressionOperator replaceExpressionParameters(final ExpressionOperator operator,
                                                                 final List<Param> params) {
        final ExpressionOperator result;
        if (operator != null) {
            final ParamValues paramValues = ParamUtil.createParamValueFunction(params);
            result = replaceExpressionParameters(operator, paramValues, false);
        } else {
            result = null;
        }
        return result;
    }
@return True if there are at least one enabled term under the expressionOperator
stroom-query/stroom-query-api/src/main/java/stroom/query/api/ExpressionUtil.java