Introduce I.Scope.p.hasImmutableBinding
Introduce I.Scope.p.hasImmutableBinding

Add Interpreter.Scope.prototype.hasImmutableBinding, to facilitate testing for binding immutability without attempting assignment.

NeilFraser/CodeCity,google/CodeCity,google/CodeCity,google/CodeCity,NeilFraser/CodeCity,NeilFraser/CodeCity,google/CodeCity,NeilFraser/CodeCity