logback-android/src/main/java/ch/qos/logback/core/ConsoleAppender.java
public void setTarget(String value) {
    @SuppressWarnings("deprecation")
    ConsoleTarget t = ConsoleTarget.findByName(value.trim());
    if (t == null) {
      targetWarn(value);
    } else {
      target = t;
    }
  }
public void setTarget(String value) {
    @SuppressWarnings("deprecation")
    ConsoleTarget t = ConsoleTarget.findByName(value.trim());
    if (t == null) {
      targetWarn(value);
    } else {
      target = t;
    }
  }
Sets the value of the <b>Target</b> option. Recognized values are
"System.out" and "System.err". Any other value will be ignored.
@param value desired console-output target