O(1) access to rows in TableView by Key lookup?

[Andrew Munn]

I have a question similar to this one:
https://stackoverflow.com/questions/16941980/populate-tableview-with-observablemap-javafx

I have a TableView in which rows can be added/updated/deleted. I want to 
be able to delete rows in a TableView without having to iteratively search the 
collection of rows.

There should be a table backed by a map for this.  Otherwise I have to 
keep my own map synchronized with the TableView's data structure.