Index: node_modules/es-toolkit/dist/set/countBy.mjs
===================================================================
--- node_modules/es-toolkit/dist/set/countBy.mjs	(revision a762898ecd37a452c782821d4c2c4955c6ed2521)
+++ node_modules/es-toolkit/dist/set/countBy.mjs	(revision a762898ecd37a452c782821d4c2c4955c6ed2521)
@@ -0,0 +1,10 @@
+function countBy(set, mapper) {
+    const result = new Map();
+    for (const value of set) {
+        const mappedKey = mapper(value, value, set);
+        result.set(mappedKey, (result.get(mappedKey) ?? 0) + 1);
+    }
+    return result;
+}
+
+export { countBy };