KeyedDecodingContainer

extension KeyedDecodingContainer

extending KeyedDecodingContainer so it will only decode an optional value if it is present


                    
                    
                    decode(_:forKey:)

Swift

public func decode<T>(_ type: T.Type, forKey key: KeyedDecodingContainer<K>.Key) throws -> T where T : OptionalCustomCodingWrapper, T : Decodable