BaseComponent.java

public BaseComponent build() {  
  if (localModule == null) {
    this.localModule = new LocalModule();
  }
  if (networkModule == null) {
    this.networkModule = new NetworkModule();
  }
  if (applicationComponent == null) {
    throw new IllegalStateException("applicationComponent must be set");
  }
  return new DaggerBaseComponent(this);
}