### Question:
DocumentUserReference implements UserReference { public DocumentReference getReference() { return this.reference; } DocumentUserReference(DocumentReference reference, EntityReferenceProvider entityReferenceProvider); DocumentReference getReference(); @Override boolean isGlobal(); @Override int hashCode(); @Override boolean equals(Object object); @Override String toString();  }### Answer:
@Test void getReference() { DocumentReference documentReference = new DocumentReference("wiki", "space", "page"); DocumentUserReference userReference = new DocumentUserReference(documentReference, null); assertEquals(documentReference, userReference.getReference()); }