code: public StorageEncryptedAssetDecryptionDataInner getEncryptionKey(String resourceGroupName, String accountName, String assetName) {
          return getEncryptionKeyWithServiceResponseAsync(resourceGroupName, accountName, assetName).toBlocking().single().body();
      }
docs: Gets the Asset storage key.
  Gets the Asset storage encryption keys used to decrypt content created by version 2 of the Media Services API.
  
  @param resourceGroupName The name of the resource group within the Azure subscription.
  @param accountName The Media Services account name.
  @param assetName The Asset name.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @throws ApiErrorException thrown if the request is rejected by server
  @throws RuntimeException all other wrapped checked exceptions if the request fails to be sent
  @return the StorageEncryptedAssetDecryptionDataInner object if successful.