Function get

worklenz-backend/src/public/tinymce/tinymce.js:1983–1988

    const NodeValue = (is, name) => {
      const get = element => {
        if (!is(element)) {
          throw new Error('Can only get ' + name + ' value of a ' + name + ' node');
        }
        return getOption(element).getOr('');
      };
      const getOption = element => is(element) ? Optional.from(element.dom.nodeValue) : Optional.none();
      const set = (element, value) => {
        if (!is(element)) {