code: public ServiceFuture<StorageAccountInner> beginCreateAsync(String resourceGroupName, String accountName, StorageAccountCreateParameters parameters, final ServiceCallback<StorageAccountInner> serviceCallback) {
          return ServiceFuture.fromResponse(beginCreateWithServiceResponseAsync(resourceGroupName, accountName, parameters), serviceCallback);
      }
docs: Asynchronously creates a new storage account with the specified parameters. If an account is already created and a subsequent create request is issued with different properties, the account properties will be updated. If an account is already created and a subsequent create or update request is issued with the exact same set of properties, the request will succeed.
  
  @param resourceGroupName The name of the resource group within the user's subscription. The name is case insensitive.
  @param accountName The name of the storage account within the specified resource group. Storage account names must be between 3 and 24 characters in length and use numbers and lower-case letters only.
  @param parameters The parameters to provide for the created account.
  @param serviceCallback the async ServiceCallback to handle successful and failed responses.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the {@link ServiceFuture} object