app/models/manageiq/providers/redhat/infra_manager/datacenter.rb
ManageIQ::Providers::Ovirt::InfraManager::Datacenter.include(ActsAsStiLeafClass)
class ManageIQ::Providers::Redhat::InfraManager::Datacenter < ManageIQ::Providers::Ovirt::InfraManager::Datacenter
def external_distributed_virtual_switches
distributed_virtual_switches.select do |s|
s.kind_of?(ManageIQ::Providers::Redhat::InfraManager::ExternalDistributedVirtualSwitch)
end
end
end