code: function getPseudoClass1() {
    const type = NodeType.PseudocType;
    const token = tokens[pos];
    const line = token.ln;
    const column = token.col;
    const content = [];
  
    // Skip `:`.
    pos++;
  
    content.push(getIdent());
  
    {
      const type = NodeType.ArgumentsType;
      const token = tokens[pos];
      const line = token.ln;
      const column = token.col;
  
      // Skip `(`.
      pos++;
  
      const selectorContent = [].concat(
        getSC(),
        getSelectorsGroup(),
        getSC()
      );
  
      const end = getLastPosition(selectorContent, line, column, 1);
      const args = newNode(type, selectorContent, line, column, end);
      content.push(args);
  
      // Skip `)`.
      pos++;
    }
  
    return newNode(type, content, line, column);
  }
docs: (-) `:not(panda)`