@group_uuids = @groups.collect &:uuid
@links_from = Link.where link_class: 'permission', tail_uuid: @group_uuids
@links_to = Link.where link_class: 'permission', head_uuid: @group_uuids
@group_uuids = @groups.collect &:uuid
@links_from = Link.where link_class: 'permission', tail_uuid: @group_uuids
@links_to = Link.where link_class: 'permission', head_uuid: @group_uuids