src/main/java/com/arpnetworking/steno/Logger.java
public void debug(@Nullable final String message, @Nullable final Throwable throwable) {
        log(LogLevel.DEBUG, DEFAULT_EVENT, message, EMPTY_STRING_ARRAY, EMPTY_OBJECT_ARRAY, throwable);
    }
public void debug(@Nullable final String message, @Nullable final Throwable throwable) {
        log(LogLevel.DEBUG, DEFAULT_EVENT, message, EMPTY_STRING_ARRAY, EMPTY_OBJECT_ARRAY, throwable);
    }
public void debug ( @ Nullable final String message , @ Nullable final Throwable throwable ) { log ( LogLevel . DEBUG , DEFAULT_EVENT , message , EMPTY_STRING_ARRAY , EMPTY_OBJECT_ARRAY , throwable ) ; }
Log a message with a <code>Throwable</code> at the debug level. Default
values are used for all other parameters.

This method is also found in the SLF4J <code>Logger</code>. It is
intended to simplify migration; however, it's use is not recommended
as it lacks an identifying event and typically includes serialized
as opposed to structured data.

@since 1.3.0

@param message The message to be logged.
@param throwable The exception (<code>Throwable</code>) to be logged.
Log a message with a <code > Throwable< / code > at the debug level . Default values are used for all other parameters .