Updated the files.

my-app/node_modules/@schematics/angular/service/schema.d.ts

@@ -0,0 +1,25 @@
+/**
+ * Creates a new, generic service definition in the given project.
+ */
+export interface Schema {
+    /**
+     * When true (the default), creates files at the top level of the project.
+     */
+    flat?: boolean;
+    /**
+     * The name of the service.
+     */
+    name: string;
+    /**
+     * The path at which to create the service, relative to the workspace root.
+     */
+    path?: string;
+    /**
+     * The name of the project.
+     */
+    project: string;
+    /**
+     * Do not create "spec.ts" test files for the new service.
+     */
+    skipTests?: boolean;
+}