code: public ServiceFuture<ImportExportResponseInner> beginCreateImportOperationAsync(String resourceGroupName, String serverName, String databaseName, ImportExtensionRequest parameters, final ServiceCallback<ImportExportResponseInner> serviceCallback) {
          return ServiceFuture.fromResponse(beginCreateImportOperationWithServiceResponseAsync(resourceGroupName, serverName, databaseName, parameters), serviceCallback);
      }
docs: Creates an import operation that imports a bacpac into an existing database. The existing database must be empty.
  
  @param resourceGroupName The name of the resource group that contains the resource. You can obtain this value from the Azure Resource Manager API or the portal.
  @param serverName The name of the server.
  @param databaseName The name of the database to import into
  @param parameters The required parameters for importing a Bacpac into a database.
  @param serviceCallback the async ServiceCallback to handle successful and failed responses.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the {@link ServiceFuture} object