logback-android/src/main/java/ch/qos/logback/core/rolling/RollingFileAppender.java
@SuppressWarnings("unchecked")
  public void setRollingPolicy(RollingPolicy policy) {
    rollingPolicy = policy;
    if (rollingPolicy instanceof TriggeringPolicy) {
      triggeringPolicy = (TriggeringPolicy<E>) policy;
    }

  }
@SuppressWarnings("unchecked")
  public void setRollingPolicy(RollingPolicy policy) {
    rollingPolicy = policy;
    if (rollingPolicy instanceof TriggeringPolicy) {
      triggeringPolicy = (TriggeringPolicy<E>) policy;
    }

  }
Sets the rolling policy. In case the 'policy' argument also implements
{@link TriggeringPolicy}, then the triggering policy for this appender is
automatically set to be the policy argument.

@param policy the desired rolling policy