anchor.diff:  
   In most execution environments, ignored feature methods and specs will be reported as "skipped".
   
  +Care should be taken when ignoring feature methods in a spec class annotated with `spock.lang.Stepwise` since
  +later feature methods may depend on earlier feature methods having executed.
  +
   === IgnoreRest
   
   To ignore all but a (typically) small subset of methods, annotate the latter with `spock.lang.IgnoreRest`:
  
positive.code: def "I'll run everywhere but on Windows"() { ... }
  ----
  
  === Requires
  
  To execute a feature method under certain conditions, annotate it with `spock.lang.Requires`,
  
negative.code: ----
  
  +@IgnoreRest+ is especially handy in execution environments that don't provide an (easy) way to run a subset of methods.
  
  Care should be taken when ignoring feature methods in a spec class annotated with `spock.lang.Stepwise` since
  later feature methods may depend on earlier feature methods having executed.
  
  === IgnoreIf
  
  