public CharSeq replaceAll(String regex,String replacement){
  return CharSeq.of(str.replaceAll(regex,replacement));
}

public CharSeq replaceAll ( String regex , String replacement ) { return CharSeq . of ( str . replaceAll ( regex , replacement ) ) ; }
return a new charseq by replacing each substring of this charseq that matches the given regular expression with the given string replacement .
