Index: node_modules/es-toolkit/dist/math/meanBy.d.mts
===================================================================
--- node_modules/es-toolkit/dist/math/meanBy.d.mts	(revision a762898ecd37a452c782821d4c2c4955c6ed2521)
+++ node_modules/es-toolkit/dist/math/meanBy.d.mts	(revision a762898ecd37a452c782821d4c2c4955c6ed2521)
@@ -0,0 +1,18 @@
+/**
+ * Calculates the average of an array of numbers when applying
+ * the `getValue` function to each element.
+ *
+ * If the array is empty, this function returns `NaN`.
+ *
+ * @template T - The type of elements in the array.
+ * @param {T[]} items An array to calculate the average.
+ * @param {(element: T) => number} getValue A function that selects a numeric value from each element.
+ * @returns {number} The average of all the numbers as determined by the `getValue` function.
+ *
+ * @example
+ * meanBy([{ a: 1 }, { a: 2 }, { a: 3 }], x => x.a); // Returns: 2
+ * meanBy([], x => x.a); // Returns: NaN
+ */
+declare function meanBy<T>(items: readonly T[], getValue: (element: T) => number): number;
+
+export { meanBy };