code: public Observable<Page<ContentKeyPolicyInner>> listAsync(final String resourceGroupName, final String accountName) {
          return listWithServiceResponseAsync(resourceGroupName, accountName)
              .map(new Func1<ServiceResponse<Page<ContentKeyPolicyInner>>, Page<ContentKeyPolicyInner>>() {
                  @Override
                  public Page<ContentKeyPolicyInner> call(ServiceResponse<Page<ContentKeyPolicyInner>> response) {
                      return response.body();
                  }
              });
      }
docs: List Content Key Policies.
  Lists the Content Key Policies in the account.
  
  @param resourceGroupName The name of the resource group within the Azure subscription.
  @param accountName The Media Services account name.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the observable to the PagedList&lt;ContentKeyPolicyInner&gt; object