code: public void typeSystemInit(TypeSystem typeSystem) throws AnalysisEngineProcessException {
  
          super.typeSystemInit(typeSystem);
  
          probabilityFeature = AnnotatorUtil.getOptionalFeatureParameter(context, tokenType,
                          UimaUtil.PROBABILITY_FEATURE_PARAMETER, CAS.TYPE_NAME_DOUBLE);
      }
docs: Initializes the type system.