copy
fun copy( return_type: String = this.return_type, errors_count: Long = this.errors_count, observed_execution_count: Long = this.observed_execution_count, estimated_execution_count: Long = this.estimated_execution_count, requests_with_errors_count: Long = this.requests_with_errors_count, latency_count: List<Long> = this.latency_count, unknownFields: ByteString = this.unknownFields): FieldStat