Sample SubComponent interface https://hackernoon.com/yet-another-mvp-article-part-2-how-dagger-helps-with-the-project-90d049a45e00

SearchSubComponent.java

package com.mirhoseini.marvel.character.search;

import dagger.Subcomponent;

@Search
@Subcomponent(modules = {
        AppSearchModule.class
})
public interface SearchSubComponent {

    void inject(CharacterSearchFragment fragment);

}