docs/VoidTransaction.md in first_data_gateway-1.8.1 vs docs/VoidTransaction.md in first_data_gateway-1.9.0

@@ -2,15 +2,16 @@
 
 ## Properties
 
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
+**transaction_amount** | [**Amount**](Amount.md) |  | [optional] 
 
 ## Code Sample
 
 ```ruby
 require 'OpenapiClient'
 
-instance = OpenapiClient::VoidTransaction.new()
+instance = OpenapiClient::VoidTransaction.new(transaction_amount: null)
 ```