# File lib/fog/ovirt/models/compute/volumes.rb, line 14
        def all(filters = {})
          requires :vm
          if vm.is_a? Fog::Compute::Ovirt::Server
            load connection.list_vm_volumes(vm.id)
          elsif vm.is_a? Fog::Compute::Ovirt::Template
            load connection.list_template_volumes(vm.id)
          else
            raise 'volumes should have vm or template'
          end
        end