def __ds(self):
ds = self.__client.options.service<EOL>if ds is None:<EOL><INDENT>return None<EOL><DEDENT>else:<EOL><INDENT>return self.__find(ds)<EOL><DEDENT>
Get the I{default} service if defined in the I{options}.
@return: A L{PortSelector} for the I{default} service.
@rtype: L{PortSelector}.