code: public ServiceFuture<ExpressRouteCrossConnectionPeeringInner> getAsync(String resourceGroupName, String crossConnectionName, String peeringName, final ServiceCallback<ExpressRouteCrossConnectionPeeringInner> serviceCallback) {
          return ServiceFuture.fromResponse(getWithServiceResponseAsync(resourceGroupName, crossConnectionName, peeringName), serviceCallback);
      }
docs: Gets the specified peering for the ExpressRouteCrossConnection.
  
  @param resourceGroupName The name of the resource group.
  @param crossConnectionName The name of the ExpressRouteCrossConnection.
  @param peeringName The name of the peering.
  @param serviceCallback the async ServiceCallback to handle successful and failed responses.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the {@link ServiceFuture} object