1 files changed, 21 insertions, 8 deletions

diff --git a/src/data/thing.js b/src/data/thing.js
index 29f50d23..f719224d 100644
--- a/src/data/thing.js
+++ b/src/data/thing.js
@@ -14,9 +14,21 @@ export default class Thing extends CacheableObject {
   static getSerializeDescriptors = Symbol.for('Thing.getSerializeDescriptors');
 
   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');
 
+  static yamlSourceFilename = Symbol.for('Thing.yamlSourceFilename');
+  static yamlSourceDocument = Symbol.for('Thing.yamlSourceDocument');
+  static yamlSourceDocumentPlacement = Symbol.for('Thing.yamlSourceDocumentPlacement');
+
+  [Symbol.for('Thing.yamlSourceFilename')] = null;
+  [Symbol.for('Thing.yamlSourceDocument')] = null;
+  [Symbol.for('Thing.yamlSourceDocumentPlacement')] = null;
+
   static isThingConstructor = Symbol.for('Thing.isThingConstructor');
   static isThing = Symbol.for('Thing.isThing');
 
@@ -24,14 +36,15 @@ export default class Thing extends CacheableObject {
   // Symbol.for('Thing.isThingConstructor') in constructor
   static [Symbol.for('Thing.isThingConstructor')] = NaN;
 
-  static [CacheableObject.propertyDescriptors] = {
+  constructor() {
+    super({seal: false});
+
     // 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;
+
+    Object.seal(this);
+  }
 
   static [Symbol.for('Thing.selectAll')] = _wikiData => [];
 
@@ -47,7 +60,7 @@ export default class Thing extends CacheableObject {
       if (this.name) {
         name = colors.green(`"${this.name}"`);
       }
-    } catch (error) {
+    } catch {
       name = colors.yellow(`couldn't get name`);
     }
 
@@ -56,7 +69,7 @@ export default class Thing extends CacheableObject {
       if (this.directory) {
         reference = colors.blue(Thing.getReference(this));
       }
-    } catch (error) {
+    } catch {
       reference = colors.yellow(`couldn't get reference`);
     }