EPackage petStorePackage = PetStorePackage.eINSTANCE; EClass dogClass = petStorePackage.getEDefaultPackage().getDog(); EPackage dogPackage = dogClass.getEPackage(); // Returns the pet store packageIn this example, we first get the pet store EPackage and then the Dog EClass from it. We then call `getEPackage()` on the Dog class to get the pet store package. Package Library: `org.eclipse.emf.ecore` is part of the Eclipse Modeling Framework (EMF) library, which provides tools for creating, editing, and persisting Java object models. EMF is an Eclipse project and is available as a library through the Eclipse Foundation.