code: public List<PerformanceTierPropertiesInner> list(String locationName) {
          return listWithServiceResponseAsync(locationName).toBlocking().single().body();
      }
docs: List all the performance tiers at specified location in a given subscription.
  
  @param locationName The name of the location.
  @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 List&lt;PerformanceTierPropertiesInner&gt; object if successful.