def configBlock = { -> enclosingCall(name('withConfig') & hasArgument('configuration')) & inClosure() & isThisType() }

contribute(configBlock()) {
  method(name:'imports', type:void, params:[block:'@DelegatesTo(org.codehaus.groovy.control.customizers.builder.ImportCustomizerFactory.ImportHelper) Closure'])
  method(name:'inline', type:void, params:[code:'@ClosureParams(value=SimpleType, options=["org.codehaus.groovy.control.SourceUnit","org.codehaus.groovy.classgen.GeneratorContext","org.codehaus.groovy.ast.ClassNode"]) Closure'], namedParams:[phase:String], optionalParams:[superClass:Class, interfaces:Class[]])
}

withConfig(configuration) {
  imports {
    star 'groovy.transform'
    normal 'java.util.regex.Matcher'
    normal 'java.util.regex.Pattern'
    alias 'Regexp', 'java.util.regex.Pattern'
    staticMember 'java.util.concurrent.TimeUnit', 'SECONDS'
    staticMember 'MILLIS', 'java.util.concurrent.TimeUnit', 'MILLISECONDS'
  }

  inline(phase:'CONVERSION') { sourceUnit, generatorContext, classNode ->
  }
}