         self.deprecationReason = deprecationReason
         self.description = description
         self.resolve = nil
+        self.subscribe = nil
     }
     
     public init(

            description: config.description,
            deprecationReason: config.deprecationReason,
            args: try defineArgumentMap(args: config.args),
            resolve: config.resolve
        )

        fieldMap[name] = field

    public let deprecationReason: String?
    public let description: String?
    public let resolve: GraphQLFieldResolve?
    public let subscribe: GraphQLFieldResolve?
    
    public init(
        type: GraphQLOutputType,
