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//// [chainedSpecializationToObjectTypeLiteral.ts]
interface Sequence<T> {
each(iterator: (value: T) => void): void;
map<U>(iterator: (value: T) => U): Sequence<U>;
filter(iterator: (value: T) => boolean): Sequence<T>;
groupBy<K>(keySelector: (value: T) => K): Sequence<{ key: K; items: T[]; }>;
}
var s: Sequence<string>;
var s2 = s.groupBy(s => s.length);
var s3 = s2.each(x => { x.key /* Type is K, should be number */ });
//// [chainedSpecializationToObjectTypeLiteral.js]
var s;
var s2 = s.groupBy(function (s) { return s.length; });
var s3 = s2.each(function (x) { x.key; /* Type is K, should be number */ });
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