code: function sandbox(data){
    var box = { _ : _, $data : data };
  
    _.extend(box, $sandbox);
    _.extend(box, data);
    // Ensure {{tmpl}} gets either a new context or this context
    box.bluemold = function(i, context, templateName){
      return bluemold(i, context || data, templateName);
    };
  
    return box;
  }
docs: private