in slf4j-to-log4j-api/src/main/java/org/apache/logging/slf4j/Log4jEventBuilder.java [109:121]
public void log() {
final LogBuilder logBuilder = logger.atLevel(level).withMarker(marker).withThrowable(throwable);
if (logBuilder instanceof BridgeAware) {
((BridgeAware) logBuilder).setEntryPoint(fqcn);
}
if (keyValuePairs == null || keyValuePairs.isEmpty()) {
logBuilder.log(message, arguments.toArray());
} else {
try (final Instance c = CloseableThreadContext.putAll(keyValuePairs)) {
logBuilder.log(message, arguments.toArray());
}
}
}