Access to the stored datasources?

[SteMMo33]

Hi there,
is there a way to get the list of the datasources added to the freeboard?
I need to trigger the refresh of some widgets pointed to the same datasource from a global function - so external from a datasource.

My try was by the freeboard.sarialize() method: this one returned the list of datasources but each of them are not 'datasouce' and then I cannot call the updateNow() method.

Or ..
is there a way to trigger the refresh of widget of 'outside' a datasource?

thanks, regards