anchor.diff:  }
   ----
   
  -CAUTION: Make sure any nested classes are `static`, or picocli will not be able to instantiate them without a <<Custom Factory>>.
  +CAUTION: Make sure any nested classes are `static`, or picocli will not be able to instantiate them.
   
   [[IParameterPreprocessor_Parser_Plugin]]
   ==== `IParameterPreprocessor` Parser Plugin
  
positive.code: 
  See the sections on <<Custom Parameter Processing>> for more details.
  
  CAUTION: Make sure any nested classes are `static`, or picocli will not be able to instantiate them without a <<Custom Factory>>.
  
  === Handling Invalid Input
  
  
negative.code: 
  All transformers are called once, after the full command hierarchy is constructed, and before any command line arguments are parsed.
  
  CAUTION: If your model transformer is declared as nested class, make sure you mark this class as `static`, or picocli will not be able to instantiate your transformer class.
  
  === Automatic Parameter Indexes
  ==== Automatic Indexes
  