open_connection (DataMapper::Adapters::DataObjectsAdapter)

    # File lib/dm-core/adapters/data_objects_adapter.rb, line 225
            def open_connection
              # DataObjects::Connection.new(uri) will give you back the right
              # driver based on the DataObjects::URI#scheme
              connection = connection_stack.last || DataObjects::Connection.new(normalized_uri)
              connection_stack << connection
              connection
            end