default void postSwitchExceedThrottleQuota(
    final ObserverContext<MasterCoprocessorEnvironment> ctx, final boolean oldValue,
    final boolean newValue) throws IOException {
  }
Called after switching exceed throttle quota state.
@param ctx      the coprocessor instance's environment
@param oldValue the previously exceed throttle quota value
@param newValue the newly exceed throttle quota value
hbase-server/src/main/java/org/apache/hadoop/hbase/coprocessor/MasterObserver.java