some possible additional https://www.typescriptlang.org/tsconfig/#useDefineForClassFields cases

Author: trentm

plugins/node/opentelemetry-instrumentation-aws-lambda/src/instrumentation.ts

@@ -71,8 +71,8 @@ const headerGetter: TextMapGetter<APIGatewayProxyEventHeaders> = {
 export const lambdaMaxInitInMilliseconds = 10_000;
 
 export class AwsLambdaInstrumentation extends InstrumentationBase<AwsLambdaInstrumentationConfig> {
-  private _traceForceFlusher?: () => Promise<void>;
-  private _metricForceFlusher?: () => Promise<void>;
+  private declare _traceForceFlusher?: () => Promise<void>;
+  private declare _metricForceFlusher?: () => Promise<void>;
 
   constructor(config: AwsLambdaInstrumentationConfig = {}) {
     super(PACKAGE_NAME, PACKAGE_VERSION, config);

plugins/node/opentelemetry-instrumentation-mongodb/src/instrumentation.ts

@@ -61,8 +61,8 @@ const DEFAULT_CONFIG: MongoDBInstrumentationConfig = {
 
 /** mongodb instrumentation plugin for OpenTelemetry */
 export class MongoDBInstrumentation extends InstrumentationBase<MongoDBInstrumentationConfig> {
-  private _connectionsUsage!: UpDownCounter;
-  private _poolName!: string;
+  private declare _connectionsUsage: UpDownCounter;
+  private declare _poolName: string;
 
   constructor(config: MongoDBInstrumentationConfig = {}) {
     super(PACKAGE_NAME, PACKAGE_VERSION, { ...DEFAULT_CONFIG, ...config });

plugins/node/opentelemetry-instrumentation-mysql/src/instrumentation.ts

@@ -55,7 +55,7 @@ export class MySQLInstrumentation extends InstrumentationBase<MySQLInstrumentati
   static readonly COMMON_ATTRIBUTES = {
     [SEMATTRS_DB_SYSTEM]: DBSYSTEMVALUES_MYSQL,
   };
-  private _connectionsUsage!: UpDownCounter;
+  private declare _connectionsUsage: UpDownCounter;
 
   constructor(config: MySQLInstrumentationConfig = {}) {
     super(PACKAGE_NAME, PACKAGE_VERSION, config);

plugins/node/opentelemetry-instrumentation-pg/src/instrumentation.ts

@@ -75,9 +75,9 @@ function extractModuleExports(module: any) {
 }
 
 export class PgInstrumentation extends InstrumentationBase<PgInstrumentationConfig> {
-  private _operationDuration!: Histogram;
-  private _connectionsCount!: UpDownCounter;
-  private _connectionPendingRequests!: UpDownCounter;
+  private declare _operationDuration: Histogram;
+  private declare _connectionsCount: UpDownCounter;
+  private declare _connectionPendingRequests: UpDownCounter;
   // Pool events connect, acquire, release and remove can be called
   // multiple times without changing the values of total, idle and waiting
   // connections. The _connectionsCounter is used to keep track of latest

plugins/node/opentelemetry-instrumentation-pino/src/log-sending-utils.ts

@@ -131,10 +131,10 @@ interface OTelPinoStreamOptions {
  *   The event arguments are: `logLine: string`, `err: string | Error`.
  */
 export class OTelPinoStream extends Writable {
-  private _otelLogger: Logger;
-  private _messageKey: string;
-  private _levels;
-  private _otelTimestampFromTime;
+  private declare _otelLogger: Logger;
+  private declare _messageKey: string;
+  private declare _levels;
+  private declare _otelTimestampFromTime;
 
   constructor(options: OTelPinoStreamOptions) {
     super();