From bf89dc00fefc01dec039ca6ea7fb1d460b0f7906 Mon Sep 17 00:00:00 2001
From: Madeorsk <m@deor.sk>
Date: Sun, 29 Jun 2025 16:41:14 +0200
Subject: [PATCH] Add model manager extension type.

---
 src/model/model.ts | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/src/model/model.ts b/src/model/model.ts
index 4c3b3d4..fc1d5bb 100644
--- a/src/model/model.ts
+++ b/src/model/model.ts
@@ -584,6 +584,19 @@ export class ModelManager<
 	}
 }
 
+/**
+ * A model manager extension is a mixin, building a new model manager class with extended capabilities.
+ * @see https://www.typescriptlang.org/docs/handbook/mixins.html
+ */
+export type ModelManagerExtension<
+	Extension extends object,
+	T extends object,
+	Shape extends ModelShape<T>,
+	Identifier extends IdentifierDefinition<T, Shape>,
+> = (
+	modelManager: ModelManager<T, Shape, Identifier>,
+) => ModelManager<T, Shape, Identifier> & Extension;
+
 /**
  * Define a new model.
  * @param definition The model definition object.