Avoid duplicates in api docs

config/jsdoc/api/plugins/api.js

@@ -59,7 +59,9 @@ function includeAugments(doclet) {
           });
         }
         cls._hideConstructor = true;
-        delete cls.undocumented;
+        if (!cls.undocumented) {
+          cls._documented = true;
+        }
       }
     }
   }
@@ -150,6 +152,9 @@ exports.handlers = {
         // Remove all other undocumented symbols
         doclet.undocumented = true;
       }
+      if (doclet._documented) {
+        delete doclet.undocumented;
+      }
     }
   }