Convert CallingHeader texts to toasts

ts/util/setUtil.ts

@@ -27,3 +27,14 @@ export const isEqual = (
   a: Readonly<Set<unknown>>,
   b: Readonly<Set<unknown>>
 ): boolean => a === b || (a.size === b.size && every(a, item => b.has(item)));
+
+export const difference = <T>(
+  a: Readonly<Set<T>>,
+  b: Readonly<Set<T>>
+): Set<T> => {
+  const result = new Set([...a]);
+  for (const item of b) {
+    result.delete(item);
+  }
+  return result;
+};