code: public ProtectionPolicyResourceInner createOrUpdate(String vaultName, String resourceGroupName, String policyName, ProtectionPolicyResourceInner resourceProtectionPolicy) {
          return createOrUpdateWithServiceResponseAsync(vaultName, resourceGroupName, policyName, resourceProtectionPolicy).toBlocking().single().body();
      }
docs: Creates or modifies a backup policy. This is an asynchronous operation. Use the GetPolicyOperationResult API to Get the operation status.
  
  @param vaultName The name of the Recovery Services vault.
  @param resourceGroupName The name of the resource group associated with the Recovery Services vault.
  @param policyName The backup policy to be created.
  @param resourceProtectionPolicy The resource backup policy.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @throws CloudException thrown if the request is rejected by server
  @throws RuntimeException all other wrapped checked exceptions if the request fails to be sent
  @return the ProtectionPolicyResourceInner object if successful.