deps/v8/src/js/i18n.js
function defineWEProperty(object, property, value) {
  %object_define_property(object, property,
                          {value: value, writable: true, enumerable: true});
}
function defineWEProperty(object, property, value) {
  %object_define_property(object, property,
                          {value: value, writable: true, enumerable: true});
}
Defines a property and sets writable and enumerable to true.
Configurable is false by default.