code: public String removeDuplicateBitsets(String javaContent, AntlrOptions options) {
  		if (!options.isOptimizeCodeQuality()) {
  			return javaContent;
  		}
  
  		return removeDuplicateFields(javaContent, followsetPattern, 1, 2, "\\bFOLLOW_\\w+\\b", "FOLLOW_%d", options.getKeptBitSetsPattern(), options.getKeptBitSetName());
  	}
docs: Remove duplicate bitset declarations to reduce the size of the static initializer but keep the bitsets
  that match the given pattern with a normalized name.