diff --git a/src/lib/listing/listing-component.directive.ts b/src/lib/listing/listing-component.directive.ts
index 986ec58..bc20fae 100644
--- a/src/lib/listing/listing-component.directive.ts
+++ b/src/lib/listing/listing-component.directive.ts
@@ -20,11 +20,11 @@ export abstract class ListingComponent<T extends Listable> extends AutoUnsubscri
     readonly noMatch$ = this._noMatch$;
     readonly noContent$ = this._noContent$;
     readonly sortedDisplayedEntities$ = this._sortedDisplayedEntities$;
+    readonly routerLinkFn?: (entity: T) => string | string[];
 
     // TODO: These should be somewhere in table listing, not generic listing
     abstract readonly tableColumnConfigs: readonly TableColumnConfig<T>[];
-    readonly tableHeaderLabel?: string;
-    readonly routerLinkFn?: (entity: T) => string | string[];
+    abstract readonly tableHeaderLabel: string;
 
     /**
      * Key used in the *trackBy* function with **ngFor* or **cdkVirtualFor*
diff --git a/src/lib/listing/models/table-column-config.model.ts b/src/lib/listing/models/table-column-config.model.ts
index 70ba78f..34679b8 100644
--- a/src/lib/listing/models/table-column-config.model.ts
+++ b/src/lib/listing/models/table-column-config.model.ts
@@ -10,7 +10,7 @@ export interface TableColumnConfig<T> {
     readonly rightIconTooltip?: string;
     readonly notTranslatable?: boolean;
     readonly width?: string;
-    readonly template?: TemplateRef<unknown>; // TODO: make required
+    readonly template: TemplateRef<unknown>;
     readonly extra?: unknown;
     last?: boolean;
 }
diff --git a/src/lib/listing/table/table.component.ts b/src/lib/listing/table/table.component.ts
index ab1d0a6..41225a3 100644
--- a/src/lib/listing/table/table.component.ts
+++ b/src/lib/listing/table/table.component.ts
@@ -46,7 +46,7 @@ export class TableComponent<T extends Listable> implements OnInit {
     @Input() itemMouseLeaveFn?: (entity: T) => void;
     routerLinkFn?: (entity: T) => string | string[];
     tableColumnConfigs!: readonly TableColumnConfig<T>[];
-    tableHeaderLabel?: string; // todo not optional
+    tableHeaderLabel!: string;
     @ViewChild(CdkVirtualScrollViewport, { static: true }) readonly scrollViewport!: CdkVirtualScrollViewport;
 
     constructor(