Where to find all open DB connections and closes them

hallo all,

When opening a DatasourceBrowser with the dispatcher using 
loadComponentFromURL(".component:DB/DataSourceBrowser", "_beamer", 0, 
aProps)
I have a connection opened with the database server.

How can i find this "opened" connection and close it with the API ?

I tried  and found a "activeConnection" on the derivided rowset

 "orowset.activeconnection.dispose"
 or
"orowset.activeConnection.close"
does nothing  the connection stays open on the server site, only closing 
OO closes  this connection

Thanks for any hint