anchor.diff:  [source,java]
   ----------------------------------------------------------------------
   public class CustomGroovyShellFactory implements GroovyShellFactory {
  - 
  +
     public GroovyShell createGroovyShell(Exchange exchange) {
       ImportCustomizer importCustomizer = new ImportCustomizer();
       importCustomizer.addStaticStars("com.example.Utils");
  
positive.code: [source,text]
  -------------------------------------------------------------
  bar = "baz";
  # some other statements ... 
  # camel take the result value as the script evaluation result
  result = body * 2 + 1
  -------------------------------------------------------------
  
negative.code: 
  [source,java]
  ---------------------------------------
  ... groovy("someGroovyExpression") ...
  ---------------------------------------
  
  For example you could use the *groovy* function to create an
  