You are reading the documentation for SDK v2, which is no longer the latest version. Switch to current
updateBillingAddressMutation
Portion of the GraphQL query used in the updateBillingAddress API endpoint
updateBillingAddressMutation = "\n mutation updateBillingAddress(
$version: Long!,
$actions: [MyCustomerUpdateAction!]!,
$storeKey: KeyReferenceInput
) {\n user: updateMyCustomer(version: $version,
actions: $actions,
storeKey: $storeKey) {\n ...DefaultCustomer\n }\n }\n"