public Span(SimpleManagedTracer tracer) { _tracer = tracer; }
internal Span(SimpleManagedTracer tracer, TraceSpan traceSpan) { _tracer = GaxPreconditions.CheckNotNull(tracer, nameof(tracer)); TraceSpan = GaxPreconditions.CheckNotNull(traceSpan, nameof(traceSpan)); }