access headers without any for sigv4

Author: jj22ee

aws-distro-opentelemetry-node-autoinstrumentation/src/otlp-aws-span-exporter.ts

@@ -56,7 +56,7 @@ export class OTLPAwsSpanExporter extends OTLPProtoTraceExporter {
         This is bad practice but there is no other way to access and inject SigV4 headers
         into the request headers before the traces get exported.
       */
-      const oldHeaders = (this as any)._delegate._transport?._transport?._parameters?.headers();
+      const oldHeaders = this['_delegate']._transport?._transport?._parameters?.headers();
 
       if (oldHeaders) {
         const request = new this.httpRequest({
@@ -83,7 +83,7 @@ export class OTLPAwsSpanExporter extends OTLPProtoTraceExporter {
 
           // See type: https://github.com/open-telemetry/opentelemetry-js/blob/experimental/v0.57.1/experimental/packages/otlp-exporter-base/src/transport/http-transport-types.ts#L31
           const newHeaders: () => Record<string, string> = () => signedRequest.headers;
-          (this as any)._delegate._transport._transport._parameters.headers = newHeaders;
+          this['_delegate']._transport._transport._parameters.headers = newHeaders;
         } catch (exception) {
           diag.debug(
             `Failed to sign/authenticate the given exported Span request to OTLP XRay endpoint with error: ${exception}`