code: function createExpressJsCallback(successHandler, errorHandler, callbacks) {
  	debug('creating express.js callback');
  
  	return function handler(req, res) {
  		debug('express.js callback called for url `%s`', req.url);
  
  		processCallbacks(
  			_.values(req.params)
  			, req.body
  			, req
  			, res
  			, successHandler
  			, errorHandler
  			, callbacks);
  	};
  }
docs: Function: createExpressJsCallback
  Encapsulates given callback function or an array with stacked callback
  functions and prepares it so it can be registered as an express js route.
  
  The two functions successHandler and errorHandler are passed to the callback
  on runtime as the first two arguments.
  
  Parameters:
  (Function) successHandler - A function which is injected as the first
  argument when executing the callback
  (Function) errorHandler - A function which is injected as the second
  argument when executing the callback
  (Function)/(Array) callbacks - An API function which should be executed.
  If you pass an array with functions, each
  function gets executed as it is stacked
  upon the array.
  
  Returns:
  (Function) to be registered with express js.
  
  See also:
  * <processCallbacks>