code: public Observable<VaultInner> updateAsync(String resourceGroupName, String vaultName, PatchVault vault) {
          return updateWithServiceResponseAsync(resourceGroupName, vaultName, vault).map(new Func1<ServiceResponse<VaultInner>, VaultInner>() {
              @Override
              public VaultInner call(ServiceResponse<VaultInner> response) {
                  return response.body();
              }
          });
      }
docs: Updates the vault.
  
  @param resourceGroupName The name of the resource group where the recovery services vault is present.
  @param vaultName The name of the recovery services vault.
  @param vault Recovery Services Vault to be created.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the observable to the VaultInner object