Span constructor
      
      Span({ 
    
    
- Attributes? attributes,
- int? childSpanCount,
- TruncatableString? displayName,
- String? endTime,
- Links? links,
- String? name,
- String? parentSpanId,
- bool? sameProcessAsParentSpan,
- String? spanId,
- String? spanKind,
- StackTrace? stackTrace,
- String? startTime,
- Status? status,
- TimeEvents? timeEvents,
Implementation
Span({
  this.attributes,
  this.childSpanCount,
  this.displayName,
  this.endTime,
  this.links,
  this.name,
  this.parentSpanId,
  this.sameProcessAsParentSpan,
  this.spanId,
  this.spanKind,
  this.stackTrace,
  this.startTime,
  this.status,
  this.timeEvents,
});