def _info(message):
    """Convenience function to log current span values.
    """
    span = values()
    _log.debug(message + ": {span} in trace {trace}. (Parent span: {parent}).".format(
        span=span.get(b3_span_id),
        trace=span.get(b3_trace_id),
        parent=span.get(b3_parent_span_id),
    ))