lib/errors.js
function RequestError(err, url) {
	VError.call(this, err, 'for url %s', url);
	this.name = RequestError.name;
}
function RequestError(err, url) {
	VError.call(this, err, 'for url %s', url);
	this.name = RequestError.name;
}
function RequestError ( err , url ) { VError . call ( this , err , 'for url %s' , url ) ; this . name = RequestError . name ; }
RequestError  Creates a new RequestError supplied to callbacks when the request to the api fails.
RequestError Creates a new RequestError supplied to callbacks when the request to the api fails .