default boolean postExists(ObserverContext<? extends RegionCoprocessorEnvironment> c, Get get,
    boolean exists) throws IOException {
    return exists;
  }
Called after the client tests for existence using a Get.
@param c      the environment provided by the region server
@param get    the Get request
@param exists the result returned by the region server
@return the result to return to the client
hbase-server/src/main/java/org/apache/hadoop/hbase/coprocessor/RegionObserver.java