extendscript-es5-shim/Object/isSealed.js

a collection of useful es5-shims for Extendscript

/*
https://github.com/es-shims/es5-shim/blob/master/es5-sham.js
*/
// ES5 15.2.3.11
// http://es5.github.com/#x15.2.3.11
if (!Object.isSealed) {
    Object.isSealed = function isSealed(object) {
        if (Object(object) !== object) {
            throw new TypeError('Object.isSealed can only be called on Objects.');
        }
        return false;
    };
}