@Nullable
    @SuppressWarnings("unchecked")
    public <T extends Fragment> T findFragmentByPane(@IntRange(from = 1, to = 2) int pane) {
        String tag = Elements.get(sPanes, pane - 1);
        return tag != null ? (T) getFragmentManager().findFragmentByTag(tag) : null;
    }
@Nullable
    @SuppressWarnings("unchecked")
    public <T extends Fragment> T findFragmentByPane(@IntRange(from = 1, to = 2) int pane) {
        String tag = Elements.get(sPanes, pane - 1);
        return tag != null ? (T) getFragmentManager().findFragmentByTag(tag) : null;
    }
@ Nullable @ SuppressWarnings ( "unchecked" ) public < T extends Fragment > T findFragmentByPane ( @ IntRange ( from = 1 , to = 2 ) int pane ) { String tag = Elements . get ( sPanes , pane - 1 ) ; return tag != null ? ( T ) getFragmentManager ( ) . findFragmentByTag ( tag ) : null ; }
Get the fragment that is displayed in the pane.

@return null if a fragment hasn't been added to the pane yet
Get the fragment that is displayed in the pane .