FeedItemDecode.swift

var pagingArrayForType = try feeds.nestedUnkeyedContainer()
var pagingContainer = pagingArrayForType
while(!pagingArrayForType.isAtEnd) {
    let feedItem = try pagingArrayForType.nestedContainer(keyedBy: FeedKeys.self)
    let type = try feedItem.decode(FeedType.self, forKey: .type)
    switch type {
        case .job: // decode job item
        case .company: // decode company item
        case .content: // decode content item
        case .event: // decode event item
        case .theme: // decode theme item
    }
}