Service example on trailsjs.io and in these docs have incorrect function call

[SupaMic]

https://trailsjs.io/doc/en/build/service.html#implement-reportcontroller

line: this.services.ReportService.getLatest(cik) returns: undefined error which stems from this.services TypeError: Uncaught error: Cannot read property 'ReportService' of undefined

correction: this.app.services

Am I missing some config to avoid this error?