Is it possible to implement "TableDataModel" instead Store for use in grid?

[fguest]

Grid can now display only the data from the store. It would be good to show the data from the abstract interface "TableDataModel", like this:

Ext.define("TableDataModel",
  countRecords: function(){},
  getFieldValue: function(numRec, fieldName){},
  ...
);

by analogy with Java Swing library...