code: public InstanceFailoverGroupInner failover(String resourceGroupName, String locationName, String failoverGroupName) {
          return failoverWithServiceResponseAsync(resourceGroupName, locationName, failoverGroupName).toBlocking().last().body();
      }
docs: Fails over from the current primary managed instance to this managed instance.
  
  @param resourceGroupName The name of the resource group that contains the resource. You can obtain this value from the Azure Resource Manager API or the portal.
  @param locationName The name of the region where the resource is located.
  @param failoverGroupName The name of the failover group.
  @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 InstanceFailoverGroupInner object if successful.