code: public ServiceFuture<ManagedDatabaseInner> updateAsync(String resourceGroupName, String managedInstanceName, String databaseName, ManagedDatabaseUpdate parameters, final ServiceCallback<ManagedDatabaseInner> serviceCallback) {
          return ServiceFuture.fromResponse(updateWithServiceResponseAsync(resourceGroupName, managedInstanceName, databaseName, parameters), serviceCallback);
      }
docs: Updates an existing database.
  
  @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 databaseName The name of the database.
  @param parameters The requested database 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