Grabbed dndbeyond's source code

```
~/go/bin/sourcemapper -output ddb -jsurl https://media.dndbeyond.com/character-app/static/js/main.90aa78c5.js
```

ddb_main/packages/rules-engine/es/engine/ClassFeature/utils.js

@@ -0,0 +1,27 @@
+import { ClassAccessors } from '../Class';
+import { AppContextTypeEnum, DB_STRING_MARTIAL_ARTS, DB_STRING_PACT_MAGIC, DB_STRING_SPELLCASTING, DB_STRING_DEDICATED_WEAPON, } from '../Core';
+import { getHideInBuilder, getHideInSheet, getLevelScale, getName } from './accessors';
+export function doesEnableSpellcasting(feature) {
+    return getName(feature) === DB_STRING_SPELLCASTING;
+}
+export function doesEnablePactMagic(feature) {
+    return getName(feature) === DB_STRING_PACT_MAGIC;
+}
+export function doesEnableDedicatedWeapon(feature) {
+    return getName(feature) === DB_STRING_DEDICATED_WEAPON;
+}
+export function doesEnableMartialArts(feature) {
+    return getName(feature).indexOf(DB_STRING_MARTIAL_ARTS) === 0;
+}
+export function getContextData(feature, charClass) {
+    return {
+        levelScale: getLevelScale(feature),
+        classLevel: charClass ? ClassAccessors.getLevel(charClass) : null,
+    };
+}
+export function getHideInContext(feature, context) {
+    if (context === AppContextTypeEnum.SHEET) {
+        return getHideInSheet(feature);
+    }
+    return getHideInBuilder(feature);
+}