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kotlinlang

Hi all
I am trying to compile the app web for jetty according to the example on <https://github.com/ktorio/ktor-samples/tree/1.3.0/deployment/jetty-war>.
The web does not get compiled, it complains:
```Exception in thread "main" groovy.lang.MissingMethodException: No signature of method: org.akhikhl.gretty.FilteringClassLoader.addServerClass() is applicable for argument types: (java.lang.String) values: [ch.qos.logback.]
        at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.unwrap(ScriptBytecodeAdapter.java:58)
        at org.codehaus.groovy.runtime.callsite.PojoMetaClassSite.call(PojoMetaClassSite.java:49)
        at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:48)```