Get the current value of property N of the binding object. Uses the [[Get]] method.
Code: (Meta Ecma)
function GetBindingValue(N, S){ var envRec = this; var bindings = envRec.bindingObject; var value = bindings.[[HasProperty]](N); if (value) return bindings.[[Get]](N); if (S) throw ReferenceError; return undefined; }