slf4j-timber/src/main/java/org/slf4j/impl/TimberAndroidLoggerAdapter.java
public void error(String msg, Throwable t) {
        log(Log.ERROR, msg, t);
    }
public void error(String msg, Throwable t) {
        log(Log.ERROR, msg, t);
    }
Log an exception (throwable) at the ERROR level with an accompanying
message.

@param msg the message accompanying the exception
@param t   the exception (throwable) to log