code: public List<VirtualMachineImageResourceInner> listPublishers(String location) {
          return listPublishersWithServiceResponseAsync(location).toBlocking().single().body();
      }
docs: Gets a list of virtual machine image publishers for the specified Azure location.
  
  @param location The name of a supported Azure region.
  @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;VirtualMachineImageResourceInner&gt; object if successful.