1.背景
下载siddhi 自定义函数的代码：https://github.com/lccbiluox2/siddhi-execution-string.git
然后运行测试类报错
org.wso2.extension.siddhi.execution.string.ContainsFunctionExtensionTestCase#testContainsFunctionExtension
Error:osgi: [siddhi-execution-string] Manifest file '${_include}' missing - please check OSGi facet settings.