getOwnKeyDescriptor(obj, key)

Return the key descriptor for the property key key on the Map-like object obj. A key descriptor is specified in ECMAScript 5 and contains keys for the property's configurable and enumerable states, as well as either value and writable for value properties, or get and set for getter/setter properties.

The default behavior can be overridden by implementing @@can.getOwnKeyDescriptor on obj; otherwise the default is to call Object.getOwnKeyDescriptor().

var foo = new DefineMap({ bar: "baz" });

getOwnKeyDescriptor(foo, "bar"); // -> {configurable: true, writable: true, enumerable: true, value: "baz"}