(self, upstream)
Remove upstream from current upstreams, this method is overridden for
        classes which handle stream specific buffers/caches
Remove upstream from current upstreams, this method is overridden for
        classes which handle stream specific buffers/caches
Remove upstream from current upstreams this method is overridden for classes which handle stream specific buffers / caches
def _remove_upstream(self, upstream):
        """Remove upstream from current upstreams, this method is overridden for
        classes which handle stream specific buffers/caches"""
        self.upstreams.remove(upstream)
def _remove_upstream ( self , upstream ) : self . upstreams . remove ( upstream )