Code Review

This pull request introduces type annotations for the logs object across several files using a new Loggers type (defined as Record<string, LoggingFunction>) to resolve TypeScript declaration build errors, and adds a type cast in pubsub.ts. The reviewer feedback points out that typing logs as a generic Record causes a loss of type safety for the specific keys of the logs objects. To fix the build errors while preserving full type safety, the reviewer suggests importing loggingUtils from google-gax directly in each file instead of using the generic Loggers annotation.