constructor() {
    this.type = 'Span'
    this.traceId = null
    this.guid = null
    this.parentId = null
    this.transactionId = null
    this.sampled = null
    this.priority = null
    this.name = null
    this.category = CATEGORIES.GENERIC
    this.component = null
    this.timestamp = null
    this.duration = null
    this['nr.entryPoint'] = null
    this['span.kind'] = null
    this.trustedParentId = null
    this.tracingVendors = null
  }
All the intrinsic attributes for span events, regardless of kind.