How to create and consume an Angular 2 Service in a Service (ES5)?

Question

JavaScript

It is important that the code be in JavaScript (ES5).
There is a project service (ProjectsService) and a project file service (FilesService) that depends on it. The file service will be called in the child component of the projects component.
Those.

app.ProjectsService = ng.core
    .Class({
        constructor: function ProjectsService() { ... }
    });
app.FilesService = ng.core
    .Class({
        constructor: [app.ProjectsService, function FilesService(projectsService) { 
            this._projectsService = projectsService;
            ...
        }]
    });
app.Cmp = ng.core
    .Component({
        ...,
        "providers" : [app.FilesService] //ProjectsService возьмем у родительского компонента
    })
    .Class({
        constructor: [
            app.FilesService, // каким образом передать экземпляр ProjectsService родительского компонента?
            function(filesService)  {
                this._filesService = filesService;
                ...
            }
        ]
    });

Answer 1

It turned out to be very simple:

app.Cmp = ng.core
    .Component({
        ...,
        "providers" : [app.FilesService] //ProjectsService возьмем у родительского компонента
    })
    .Class({
        constructor: [
            app.ProjectService,
            app.FilesService, 
            function(projectService, filesService)  {
                this._projectService = projectService;
                this._filesService = filesService;
                ...
            }
        ]
    });