code: public Observable<DatabaseAccountInner> beginCreateOrUpdateAsync(String resourceGroupName, String accountName, DatabaseAccountCreateUpdateParameters createUpdateParameters) {
          return beginCreateOrUpdateWithServiceResponseAsync(resourceGroupName, accountName, createUpdateParameters).map(new Func1<ServiceResponse<DatabaseAccountInner>, DatabaseAccountInner>() {
              @Override
              public DatabaseAccountInner call(ServiceResponse<DatabaseAccountInner> response) {
                  return response.body();
              }
          });
      }
docs: Creates or updates an Azure Cosmos DB database account.
  
  @param resourceGroupName Name of an Azure resource group.
  @param accountName Cosmos DB database account name.
  @param createUpdateParameters The parameters to provide for the current database account.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the observable to the DatabaseAccountInner object