core/src/com/google/inject/Key.java
public static <T> Key<T> get(Class<T> type) {
    return new Key<T>(type, NullAnnotationStrategy.INSTANCE);
  }
public static <T> Key<T> get(Class<T> type) {
    return new Key<T>(type, NullAnnotationStrategy.INSTANCE);
  }
Gets a key for an injection type.