code: function json_sender(data, req, res, next) {
  		debug.assert(data).is('object');
  		debug.assert(req).is('object');
  		debug.assert(res).is('object');
  		debug.assert(next).is('function');
  
  		var content;
  
  		if(req.headers['x-pretty-print'] || req.headers['x-pretty-json']) {
  			content = JSON.stringify(data, null, 2);
  		} else {
  			content = JSON.stringify(data);
  		}
  
  		if(content) {
  			// Only set headers if not sent already and no content-type queued
  			if( (!res.headersSent) && (!res.getHeader('content-type')) ) {
  				res.set('Content-Type', 'application/json;charset=utf-8');
  			}
  			res.send(content + '\n');
  		}
  	}
docs: debug.log('here');