TablePane implementation

[Edgar Merino]

Hello, long time I haven't write to this list. I'm currently developing 
a "text engine" for php, most of the component hierarchy model I'm using 
is based on pivot (conceptually). For laying out components I've chose 
to use Containers too, by looking at TablePane's source code I see it 
extends Container, but somehow I don't see it using the "components" 
ArrayList Container has, instead it's defining it's own Sequences 
(RowSequence and ColumnSequence) and using them, ignoring it's parent's 
components. So the question is, what is the reason behind TablePane 
extending Container? adding a component to a TablePane using 
TablePane#add() doesn't make sense to me, but maybe I'm missing something.

P.S. I still have some code I'd like to contribute, but work's on me 
right now :).

Thanks in advance,
Edgar Merino