    # File lib/fog/aws/requests/dynamodb/update_item.rb, line 33
            def update_item(table_name, key, attribute_updates, options = {})
              body = {
                'AttributeUpdates'  => attribute_updates,
                'Key'               => key,
                'TableName'         => table_name
              }.merge(options)

              request(
                :body     => Fog::JSON.encode(body),
                :headers  => {'x-amz-target' => 'DynamoDB_20111205.UpdateItem'}
              )
            end