slf4j-timber/src/main/java/org/slf4j/impl/TimberAndroidLoggerAdapter.java
public void debug(String format, Object arg1, Object arg2) {
        formatAndLog(Log.DEBUG, format, arg1, arg2);
    }
public void debug(String format, Object arg1, Object arg2) {
        formatAndLog(Log.DEBUG, format, arg1, arg2);
    }
Log a message at level DEBUG according to the specified format and
arguments.
<p>
<p>
This form avoids superfluous object creation when the logger is disabled
for the DEBUG level.
</p>

@param format the format string
@param arg1   the first argument
@param arg2   the second argument