@Override
    public String builder(final String paramName, final ServerWebExchange exchange) {
        ShenyuContext shenyuContext = exchange.getAttribute(Constants.CONTEXT);
        return (String) ReflectUtils.getFieldValue(shenyuContext, paramName);
    }
@Test
    public void testBuilder() {
        assertEquals("post", this.postParameterData.builder("httpMethod", this.exchange));
        assertEquals("http", this.postParameterData.builder("rpcType", this.exchange));
    }