code: function() {
      var tok = this.expect('mixin');
      var name = tok.val;
      var args = tok.args;
  
      if ('indent' == this.peek().type) {
        this.inMixin++;
        var mixin = {
          type: 'Mixin',
          name: name,
          args: args,
          block: this.block(),
          call: false,
          line: tok.line,
          filename: this.filename
        };
        this.inMixin--;
        return mixin;
      } else {
        this.error('MIXIN_WITHOUT_BODY', 'Mixin ' + name + ' declared without body', tok);
      }
    }
docs: mixin block