isServiceFactory` property to this factory or extend from Ember.Service

Warning Message in my console: Any solutions for this ?

ember.debug.js:7751 DEPRECATION: In Ember 2.0 service factories must have an isServiceFactory property set to true. You registered (unknown mixin) as a service factory. Either add the isServiceFactory property to this factory or extend from Ember.Service. [deprecation id: ember-application.validate-type]

What type of service is this? Is it extending from Ember.Service?