code: public ServiceFuture<ManagedInstanceKeyInner> createOrUpdateAsync(String resourceGroupName, String managedInstanceName, String keyName, ManagedInstanceKeyInner parameters, final ServiceCallback<ManagedInstanceKeyInner> serviceCallback) {
          return ServiceFuture.fromResponse(createOrUpdateWithServiceResponseAsync(resourceGroupName, managedInstanceName, keyName, parameters), serviceCallback);
      }
docs: Creates or updates a managed instance key.
  
  @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 managedInstanceName The name of the managed instance.
  @param keyName The name of the managed instance key to be operated on (updated or created).
  @param parameters The requested managed instance key resource state.
  @param serviceCallback the async ServiceCallback to handle successful and failed responses.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the {@link ServiceFuture} object