code: @Override
      public DBSnapshot copyDBSnapshot(CopyDBSnapshotRequest request) {
          request = beforeClientExecution(request);
          return executeCopyDBSnapshot(request);
      }
docs: <p>
  Copies the specified DB snapshot. The source DB snapshot must be in the "available" state.
  </p>
  <p>
  You can copy a snapshot from one AWS Region to another. In that case, the AWS Region where you call the
  <code>CopyDBSnapshot</code> action is the destination AWS Region for the DB snapshot copy.
  </p>
  <p>
  For more information about copying snapshots, see <a
  href="https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/USER_CopyDBSnapshot.html">Copying a DB Snapshot</a>
  in the <i>Amazon RDS User Guide.</i>
  </p>
  
  @param copyDBSnapshotRequest
  @return Result of the CopyDBSnapshot operation returned by the service.
  @throws DBSnapshotAlreadyExistsException
  <i>DBSnapshotIdentifier</i> is already used by an existing snapshot.
  @throws DBSnapshotNotFoundException
  <i>DBSnapshotIdentifier</i> doesn't refer to an existing DB snapshot.
  @throws InvalidDBSnapshotStateException
  The state of the DB snapshot doesn't allow deletion.
  @throws SnapshotQuotaExceededException
  The request would result in the user exceeding the allowed number of DB snapshots.
  @throws KMSKeyNotAccessibleException
  An error occurred accessing an AWS KMS key.
  @sample AmazonRDS.CopyDBSnapshot
  @see <a href="http://docs.aws.amazon.com/goto/WebAPI/rds-2014-10-31/CopyDBSnapshot" target="_top">AWS API
  Documentation</a>