1 files changed, 7 insertions, 6 deletions
diff --git a/src/data/thing.js b/src/data/thing.js
index 78ad3642..c51c5fe5 100644
--- a/src/data/thing.js
+++ b/src/data/thing.js
@@ -16,6 +16,8 @@ export default class Thing extends CacheableObject {
   static findSpecs = Symbol.for('Thing.findSpecs');
   static findThisThingOnly = Symbol.for('Thing.findThisThingOnly');
 
+  static reverseSpecs = Symbol.for('Thing.reverseSpecs');
+
   static yamlDocumentSpec = Symbol.for('Thing.yamlDocumentSpec');
   static getYamlLoadingSpec = Symbol.for('Thing.getYamlLoadingSpec');
 
@@ -26,14 +28,13 @@ export default class Thing extends CacheableObject {
   // Symbol.for('Thing.isThingConstructor') in constructor
   static [Symbol.for('Thing.isThingConstructor')] = NaN;
 
-  static [CacheableObject.propertyDescriptors] = {
+  constructor() {
+    super();
+
     // To detect:
     // Object.hasOwn(object, Symbol.for('Thing.isThing'))
-    [Symbol.for('Thing.isThing')]: {
-      flags: {expose: true},
-      expose: {compute: () => NaN},
-    },
-  };
+    this[Symbol.for('Thing.isThing')] = NaN;
+  }
 
   static [Symbol.for('Thing.selectAll')] = _wikiData => [];