code: function unsafeHTMLDirective(value) {
    return function(part) {
      if (!isNodePart(part)) {
        throw Error('The `unsafeHTML` directive can only be used in text nodes');
      }
      part.setValue(`${unsafePrefixString}${value}`);
    };
  }
docs: Render "value" without HTML escaping
  
  @param { string } value
  @returns { (part: NodePart) => void }