docs: def get(self, conn_name, default=None, **kwargs):
          """ returns the specified connection
  
          args:
              conn_name: the name of the connection
          """
  
          if isinstance(conn_name, RdfwConnections):
              return conn_name
          try:
              return self.conns[conn_name]
          except KeyError:
              if default:
                  return self.get(default, **kwargs)
              raise LookupError("'%s' connection has not been set" % conn_name)