Typescript: Object of T but value is Predicate -

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for following function (see http://ramdajs.com/docs/#where)

var spec2 = {x: function(val, obj) { return  val + obj.y > 10; }}; r.where(spec2, {x: 2, y: 7}); //=> false r.where(spec2, {x: 3, y: 8}); //=> true

i create typing case object t has value of predicate.

i thinking this:

    where<t>(spec: {item: (val: any, testobj: t) => boolean}, testobj: t): boolean;

but i'm not sure key.

there isn't way represent in typescript type system.


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