public boolean getLocationEnabled() {
    return "true".equals(get(Log4jSystemConfig.LOCATION_ENABLED, "false"));
  }
Defines whether or not to include file location information for Log4J
appender messages. File location information includes the method, line
number, class, etc.

@return If true, will include file location (method, line number, etc)
        information in Log4J appender messages.
samza-log4j2/src/main/java/org/apache/samza/config/Log4jSystemConfig.java