code: @Override
      public DeleteSubnetGroupResult deleteSubnetGroup(DeleteSubnetGroupRequest request) {
          request = beforeClientExecution(request);
          return executeDeleteSubnetGroup(request);
      }
docs: <p>
  Deletes a subnet group.
  </p>
  <note>
  <p>
  You cannot delete a subnet group if it is associated with any DAX clusters.
  </p>
  </note>
  
  @param deleteSubnetGroupRequest
  @return Result of the DeleteSubnetGroup operation returned by the service.
  @throws SubnetGroupInUseException
  The specified subnet group is currently in use.
  @throws SubnetGroupNotFoundException
  The requested subnet group name does not refer to an existing subnet group.
  @throws ServiceLinkedRoleNotFoundException
  @sample AmazonDax.DeleteSubnetGroup
  @see <a href="http://docs.aws.amazon.com/goto/WebAPI/dax-2017-04-19/DeleteSubnetGroup" target="_top">AWS API
  Documentation</a>