diff --git a/package.json b/package.json
index 5d0c1b2..6c2d4bf 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@thilawyn/traitify-ts",
-  "version": "0.1.8",
+  "version": "0.1.9",
   "type": "module",
   "publishConfig": {
     "registry": "https://git.jvalver.de/api/packages/thilawyn/npm/"
diff --git a/src/TraitBuilder.ts b/src/TraitBuilder.ts
index bcc45ee..26cdcb9 100644
--- a/src/TraitBuilder.ts
+++ b/src/TraitBuilder.ts
@@ -45,13 +45,12 @@ export class TraitBuilder<
     ImplClass       extends AbstractClass<object, []>,
 > {
     constructor(
-        private readonly traitSuperExpression:  SuperExpression,
-        private readonly traitAbstract:         Abstract,
-        private readonly traitStaticAbstract:   StaticAbstract,
-        private readonly traitApply:            (Super: AbstractClass<object>) => ImplClass,
+        protected readonly traitSuperExpression:  SuperExpression,
+        protected readonly traitAbstract:         Abstract,
+        protected readonly traitStaticAbstract:   StaticAbstract,
+        protected readonly traitApply:            (Super: AbstractClass<object>) => ImplClass,
     ) {}
 
-    // TODO: consider "implements" as a name?
     abstract<A extends Abstract>(
         _: (Super: AbstractClass<Abstract>) => AbstractClass<A, []>
     ) {
@@ -63,7 +62,6 @@ export class TraitBuilder<
         )
     }
 
-    // TODO: consider "staticImplements" as a name?
     staticAbstract<A extends StaticAbstract>(
         _: (Super: AbstractClass<StaticAbstract>) => AbstractClass<A, []>
     ) {
@@ -75,7 +73,6 @@ export class TraitBuilder<
         )
     }
 
-    // TODO: consider "impl" as a name?
     implement<
         ImplClassWithAbstract extends ImplSuper<typeof this>  // TODO: find a way to set the constraint to concrete classes while keeping the Super arg as an abstract class
     >(
diff --git a/src/TraitExpressionBuilder.ts b/src/TraitExpressionBuilder.ts
index 0fd65d6..35ce56a 100644
--- a/src/TraitExpressionBuilder.ts
+++ b/src/TraitExpressionBuilder.ts
@@ -64,8 +64,8 @@ export class TraitExpressionBuilder<
     const Traits extends Trait<any, any, any, any>[],
 > {
     constructor(
-        private readonly expressionSuperclass:  Superclass,
-        private readonly expressionTraits:      Traits,
+        protected readonly expressionSuperclass:  Superclass,
+        protected readonly expressionTraits:      Traits,
     ) {}
 
     extends<