86       case 3: return function(iteratee, context) {
87         return _[method](this[attribute], cb(iteratee, this), context);
89       case 4: return function(iteratee, defaultVal, context) {
90         return _[method](this[attribute], cb(iteratee, this), defaultVal, context);
144 …  if (callback !== void 0 && 'context' in opts && opts.context === void 0) opts.context = callback;
162   Events.on = function(name, callback, context) {  argument
163     return internalOn(this, name, callback, context);
167   var internalOn = function(obj, name, callback, context, listening) {  argument
169       context: context,
207       var context = options.context, ctx = options.ctx, listening = options.listening;
210 …  handlers.push({callback: callback, context: context, ctx: context || ctx, listening: listening});
219   Events.off = function(name, callback, context) {  argument
222       context: context,
254     var context = options.context, listeners = options.listeners;
257     if (!name && !callback && !context) {
282               context && context !== handler.context
308   Events.once = function(name, callback, context) {  argument
311     if (typeof name === 'string' && context == null) callback = void 0;
312     return this.on(events, callback, context);
602         if (success) success.call(options.context, model, resp, options);
645         if (success) success.call(options.context, model, resp, options);
679         if (success) success.call(options.context, model, resp, options);
1064         if (success) success.call(options.context, collection, resp, options);
1084         if (success) success.call(callbackOpts.context, m, resp, callbackOpts);
1457       if (error) error.call(options.context, xhr, textStatus, errorThrown);
1940       if (error) error.call(options.context, model, resp, options);