default void postTruncateTable(final ObserverContext<MasterCoprocessorEnvironment> ctx,
    TableName tableName) throws IOException {
  }
Called after the truncateTable operation has been requested. Called as part of truncate table
RPC call. The truncate is synchronous, so this method will be called when the truncate
operation is terminated.
@param ctx       the environment to interact with the framework and master
@param tableName the name of the table
hbase-server/src/main/java/org/apache/hadoop/hbase/coprocessor/MasterObserver.java