anchor.diff:  
   However, this is *not recommended*, we recommend that you fix the POM file and run the build with all the checks in place.
   
  -=== java.lang.NoClassDefFoundError or java.lang.ClassNotFoundException while running the plugin
  +=== java.lang.NoClassDefFoundError or java.lang.ClassNotFoundException with a custom plugin
   
   Sometimes, when you develop a custom plugin, a `java.lang.NoClassDefFoundError` or a `java.lang.ClassNotFoundException` exception may occur on starting Kill Bill. This is most probably because the class in question is not present on the classpath. 
   
  
positive.code:   <packagen>
  </osgi.export>
  
  . This causes the specified packages to be added to the `Export-Package` header of the plugin jar.
  
  . Other plugins can then use the classes in these packages by importing them as explained above.
  
  === Examples of Plugins
  
  
negative.code:             <packagen>
  </osgi.extra-import> 
  
  . <<Build>> the plugin using Maven as specified above.
  
  This causes the package to be added to the `Import-Package` header of the plugin jar. You can see an example of this in the https://github.com/killbill/killbill-adyen-plugin/blob/0c5205d2ee42b543852e7cbd1a6f6f065ad575e5/pom.xml#L44[Kill Bill Adyen Plugin pom file]. 
  
  ==== Exporting Additional Packages from a Plugin
  