@GET
    @Operation(summary = "List the current loggers that have their levels explicitly set and their log levels")
    public Response listLoggers() {
        return Response.ok(herder.allLoggerLevels()).build();
    }
List the current loggers that have their levels explicitly set and their log levels.

@return a list of current loggers and their levels.
connect/runtime/src/main/java/org/apache/kafka/connect/runtime/rest/resources/LoggingResource.java