hasOwnKey(obj, key)

Return true if an object's own properties include the property key key, false otherwise. An object may implement @@can.hasOwnKey to override default behavior. By default, canReflect.hasOwnKey will first look for [can-symbol/symbols/getOwnKey @@can.getOwnKey] on obj. If present, it will call @@can.getOwnKey and test key against the returned Array of keys. If absent, Object.prototype.hasOwnKey() is used.

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

canReflect.hasOwnKey(foo, "bar"); // -> true
canReflect.hasOwnKey(foo, "each"); // -> false
foo.each // -> function each() {...}