default Result postAppend(ObserverContext<? extends RegionCoprocessorEnvironment> c,
    Append append, Result result, WALEdit edit) throws IOException {
    return postAppend(c, append, result);
  }
Called after Append
<p>
Note: Do not retain references to any Cells in 'append' beyond the life of this invocation. If
need a Cell reference for later use, copy the cell and use that.
@param c      the environment provided by the region server
@param append Append object
@param result the result returned by increment
@param edit   The WALEdit object for the wal
@return the result to return to the client
hbase-server/src/main/java/org/apache/hadoop/hbase/coprocessor/RegionObserver.java