ServerProvider.getDataHandlerDbms

gda.data_handler.DataHandler getDataHandlerDbms(gda.connection.Connection cnc, string forType)

Find a #GdaDataHandler object to manipulate data of type for_type.

this function is currently very poorly implemented by database providers.

`cnc`	a #GdaConnection object, or null
`forType`	a DBMS type definition

a #GdaDataHandler, or null if the provider does not know about the for_type type