Dagger 2-工厂的静态实例

Question

为什么Dagger使用提供依赖项的工厂的静态实例？在这种情况下，INSTANCE具有静态生存期，并且当依赖项未与任何作用域关联时，甚至都不需要（在这种情况下，使用了proxyProvidesSomeDependency）。即使与范围一起使用，依赖项的工厂为什么也要比依赖项或提供该依赖项的组件长寿？我想念什么吗？

public final class FragmentModule_ProvidesSomeDependencyFactory
implements Factory<SomeDependency> {
    private static final FragmentModule_ProvidesSomeDependencyFactory INSTANCE =
            new FragmentModule_ProvidesSomeDependencyFactory();

    @Override
    public SomeDependency get() {
        return provideInstance();
    }

    public static SomeDependency provideInstance() {
        return proxyProvidesSomeDependency();
    }

    public static FragmentModule_ProvidesSomeDependencyFactory create() {
        return INSTANCE;
    }

    public static SomeDependency proxyProvidesSomeDependency() {
        return Preconditions.checkNotNull(
                FragmentModule.providesSomeDependency(),
                "Cannot return null from a non-@Nullable @Provides method");
    }
}