code: function() {
      var tok = this.expect('keyframes')
        , keyframes;
  
      this.skipSpacesAndComments();
      keyframes = new nodes.Keyframes(this.selectorParts(), tok.val);
      keyframes.column = tok.column;
  
      this.skipSpacesAndComments();
  
      // block
      this.state.push('atrule');
      keyframes.block = this.block(keyframes);
      this.state.pop();
  
      return keyframes;
    }
docs: keyframes name block