code: public ExpressRouteConnectionInner get(String resourceGroupName, String expressRouteGatewayName, String connectionName) {
          return getWithServiceResponseAsync(resourceGroupName, expressRouteGatewayName, connectionName).toBlocking().single().body();
      }
docs: Gets the specified ExpressRouteConnection.
  
  @param resourceGroupName The name of the resource group.
  @param expressRouteGatewayName The name of the ExpressRoute gateway.
  @param connectionName The name of the ExpressRoute connection.
  @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 ExpressRouteConnectionInner object if successful.