Polyfills for Object.seal, Object.isSealed, Object.isFrozen
Polyfills for Object.seal, Object.isSealed, Object.isFrozen

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