!7

abstract !include once #1016122 // TextArea
 
sclass NewFacts > TextArea {
  void add(S s) {
    if (nemptyAfterTrim(s))
      setText(appendNewLineIfNempty(text()) + s);
  }
  
  void remove(S s) {
    setText(lines(nempties(listWithoutSet(lines(text()), lines(s)))));
  }
}