This repository contains the code for "Old SES": the one whose default export is a single object named SES, which has a property named SES.makeSESRootRealm(). This code was used to make all NPM releases of the SES package up through the '0.6.x' series. Modern SES development is now happening in the SES-shim repository. This "New SES" has a named export named lockdown(), which introduces the Compar