@Override
                public void run() {
                    lifecycle.addListener(RequestManager.this);
                }
A class for managing and starting requests for Glide. Can use activity, fragment and connectivity lifecycle events to
intelligently stop, start, and restart requests. Retrieve either by instantiating a new object, or to take advantage
built in Activity and Fragment lifecycle handling, use the static Glide.load methods with your Fragment or Activity.

@see Glide#with(android.app.Activity)
@see Glide#with(android.support.v4.app.FragmentActivity)
@see Glide#with(android.app.Fragment)
@see Glide#with(android.support.v4.app.Fragment)
@see Glide#with(Context)
core/src/main/java/com/bumptech/glide/RequestManager.java