diff --git a/includes/DataStore.php b/includes/DataStore.php
index 079cee8..4d7ea20 100644
--- a/includes/DataStore.php
+++ b/includes/DataStore.php
@@ -18,6 +18,15 @@ class DataStore {
 	 */
 	protected $data = [];
 
+	/**
+	 * Get the total number of items in the data store.
+	 *
+	 * @return int
+	 */
+	public function count() {
+		return count( $this->data );
+	}
+
 	/**
 	 * Delete a value by key.
 	 *