anchor.diff:      import java.util.HashMap;
       import java.util.ArrayList;
       import java.math.BigDecimal;
  +    import java.math.BigInteger;
   }
   
   @lexer::header {
  
positive.code: 
    //private HashMap allheaders = new HashMap();
  
    public static OcciParser getParser(String occiHeader) throws Exception {
  
      CharStream stream = new ANTLRStringStream(occiHeader);
  	  OcciLexer lexer = new OcciLexer(stream);
  	  CommonTokenStream tokenStream = new CommonTokenStream(lexer);
  	  OcciParser parser = new OcciParser(tokenStream);
  
      return parser;
    }
  
negative.code: /*
  Copyright (c) 2008-2011, Intel Performance Learning Solutions Ltd.
  All rights reserved.
  
  