core/src/com/google/inject/Key.java
public static Key<?> get(Type type, Class<? extends Annotation> annotationType) {
    return new Key<Object>(type, strategyFor(annotationType));
  }
public static Key<?> get(Type type, Class<? extends Annotation> annotationType) {
    return new Key<Object>(type, strategyFor(annotationType));
  }
Gets a key for an injection type and an annotation type.