def METHOD_NAME(self):
    """Return traceparent string as defined in W3C trace context specification.
    Example:
    Value = 00-4bf92f3577b34da6a3ce929d0e0e4736-00f067aa0ba902b7-01
    base16(version) = 00
    base16(trace-id) = 4bf92f3577b34da6a3ce929d0e0e4736
    base16(parent-id) = 00f067aa0ba902b7
    base16(trace-flags) = 01  // sampled
    :return: a traceparent string
    :rtype: str
    """
    return self.to_header()["traceparent"]