private static boolean isNameMapping(final String parameterTypes) {
        return parameterTypes.startsWith("{") && parameterTypes.endsWith("}");
    }
build multi parameters.

@param body           the parameter body.
@param parameterTypes the parameter types.
@return the parameters.
shenyu-plugin/shenyu-plugin-api/src/main/java/org/apache/shenyu/plugin/api/utils/BodyParamUtils.java