I have a case where I have two windows that each have there own copy of a local json string. They both read in their data from the same source. When I change data on one, I want the other window to update, so I tried this.

//_iUI.windows[w].window.gridIDMap.dataSource._data This is one window
//INSTANCE.gridIDMap.dataSource._data; this is the other.
                                _iUI.windows[w].window.gridIDMap( "dataSourceObject", INSTANCE.gridIDMap.dataSource._data );
                                _iUI.windows[w].window.gridIDMap( "dataBind" );

This didnt work but if I do this

_iUI.windows[w].window.gridIDMap.dataSource._data = INSTANCE.gridIDMap.dataSource._data;
_iUI.windows[w].window.gridIDMap( "dataBind" );

The data still does not update on the screen but it was actually changed. I say that because if I double click on a cell I see the new data for a brief second but then is quickly change back to the screen value. 

Is this not the best way to do this?