/// <summary>
/// Initializes a new instance of the <see cref="ChildTracer"/> class.
/// Creates and starts child activity.
/// </summary>
/// <param name="parentTracer">Parent tracer.</param>
/// <param name="activityName">Activity name.</param>
/// <param name="tags">Optional activity tags.</param>
public ChildTracer(ITracer parentTracer, string activityName, IReadOnlyCollection <KeyValuePair <string, object?> >?tags = null)
{
parentTracer.AssertArgumentNotNull(nameof(parentTracer));
ActivitySource = parentTracer.ActivitySource;
MainActivity = parentTracer.StartActivity(activityName, tags);
}