code: @Override
      public DeleteCacheParameterGroupResult deleteCacheParameterGroup(DeleteCacheParameterGroupRequest request) {
          request = beforeClientExecution(request);
          return executeDeleteCacheParameterGroup(request);
      }
docs: <p>
  Deletes the specified cache parameter group. You cannot delete a cache parameter group if it is associated with
  any cache clusters.
  </p>
  
  @param deleteCacheParameterGroupRequest
  Represents the input of a <code>DeleteCacheParameterGroup</code> operation.
  @return Result of the DeleteCacheParameterGroup operation returned by the service.
  @throws InvalidCacheParameterGroupStateException
  The current state of the cache parameter group does not allow the requested operation to occur.
  @throws CacheParameterGroupNotFoundException
  The requested cache parameter group name does not refer to an existing cache parameter group.
  @throws InvalidParameterValueException
  The value for a parameter is invalid.
  @throws InvalidParameterCombinationException
  Two or more incompatible parameters were specified.
  @sample AmazonElastiCache.DeleteCacheParameterGroup
  @see <a href="http://docs.aws.amazon.com/goto/WebAPI/elasticache-2015-02-02/DeleteCacheParameterGroup"
  target="_top">AWS API Documentation</a>