Musique/node_modules/es5-ext/object/ensure-thenable.js

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"use strict";
var safeToString = require("../safe-to-string")
, isThenable = require("./is-thenable");
module.exports = function (value) {
if (!isThenable(value)) throw new TypeError(safeToString(value) + " is not a thenable");
return value;
};