public boolean preGet(final Get get, final List<Cell> results) throws IOException {
    if (coprocEnvironments.isEmpty()) {
      return false;
    }
    boolean bypassable = true;
    return execOperation(new RegionObserverOperationWithoutResult(bypassable) {
      @Override
      public void call(RegionObserver observer) throws IOException {
        observer.preGetOp(this, get, results);
      }
    });
  }
Supports Coprocessor 'bypass'.
@param get     the Get request
@param results What to return if return is true/'bypass'.
@return true if default processing should be bypassed.
@exception IOException Exception
hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/RegionCoprocessorHost.java