Running the following through hsm

export default function(context, args) {
    const a = {
        b: function() {
            return this;
        },
    }

    return a.b();
}
}

produces the below

function(context, args) {
  let a = {
    b: function () {
      return undefined
    }
  }
  return a.b()
}

notice the conversion of this to undefined. this in b should refer to a

This issue seems very closely related to #236