default void preGetOp(ObserverContext<? extends RegionCoprocessorEnvironment> c, Get get,
    List<Cell> result) throws IOException {
  }
Called before the client performs a Get
<p>
Call CoprocessorEnvironment#bypass to skip default actions. If 'bypass' is set, we skip out on
calling any subsequent chained coprocessors.
@param c      the environment provided by the region server
@param get    the Get request
@param result The result to return to the client if default processing is bypassed. Can be
              modified. Will not be used if default processing is not bypassed.
hbase-server/src/main/java/org/apache/hadoop/hbase/coprocessor/RegionObserver.java