55     private readonly descriptor: string,  property in TraceHasOldData
72       `${this.descriptor}: discarded because data is old` +
80     private readonly descriptor: string,  property in TraceOverridden
92       return `${this.descriptor}: overridden by another trace of type ${
96     return `${this.descriptor}: overridden by another trace of same type`;
101   constructor(private readonly descriptor: string) {  property in UnsupportedFileFormat
110     return `${this.descriptor}: unsupported format`;
116     private readonly descriptor: string,  property in InvalidLegacyTrace
127     return `${this.descriptor}: ${this.errorMessage}`;
133     private readonly descriptor: string,  property in InvalidPerfettoTrace
144     return `${this.descriptor}: ${this.errorMessages.join(', ')}`;
329   constructor(private descriptor: string, private totalPacketLoss: number) {  property in PerfettoPacketLoss
338     return `${this.descriptor}: ${this.totalPacketLoss} packet${