typegoose patch

@typegoose+typegoose+7.0.0.patch

diff --git a/node_modules/@typegoose/typegoose/lib/typeguards.d.ts b/node_modules/@typegoose/typegoose/lib/typeguards.d.ts
index 0673d2c..3b602d7 100644
--- a/node_modules/@typegoose/typegoose/lib/typeguards.d.ts
+++ b/node_modules/@typegoose/typegoose/lib/typeguards.d.ts
@@ -3,19 +3,19 @@ import type { DocumentType, Ref, RefType } from './types';
  * Check if the given document is already populated
  * @param doc The Ref with uncertain type
  */
-export declare function isDocument<T, S extends RefType>(doc: Ref<T, S>): doc is DocumentType<T>;
+export declare function isDocument<T extends { _id: RefType }, S extends RefType>(doc: Ref<T, S>): doc is DocumentType<T>;
 /**
  * Check if the given array is already populated
  * @param docs The Array of Refs with uncertain type
  */
-export declare function isDocumentArray<T, S extends RefType>(docs: Ref<T, S>[]): docs is DocumentType<T>[];
+export declare function isDocumentArray<T extends { _id: RefType }, S extends RefType>(docs: Ref<T, S>[]): docs is DocumentType<T>[];
 /**
  * Check if the document is not undefined/null and is not an document
  * @param doc The Ref with uncretain type
  */
-export declare function isRefType<T, S extends RefType>(doc: Ref<T, S>): doc is S;
+export declare function isRefType<T extends { _id: RefType }, S extends RefType>(doc: Ref<T, S>): doc is S;
 /**
  * Check if the document is not undefined/null and is not an document
  * @param docs The Ref with uncretain type
  */
-export declare function isRefTypeArray<T, S extends RefType>(docs: Ref<T, S>[]): docs is S[];
+export declare function isRefTypeArray<T extends { _id: RefType }, S extends RefType>(docs: Ref<T, S>[]): docs is S[];
diff --git a/node_modules/@typegoose/typegoose/lib/types.d.ts b/node_modules/@typegoose/typegoose/lib/types.d.ts
index 2fbe794..a66b58e 100644
--- a/node_modules/@typegoose/typegoose/lib/types.d.ts
+++ b/node_modules/@typegoose/typegoose/lib/types.d.ts
@@ -239,15 +239,17 @@ export interface VirtualOptions {
 export declare type PropOptionsWithNumberValidate = PropOptions & ValidateNumberOptions;
 export declare type PropOptionsWithStringValidate = PropOptions & TransformStringOptions & ValidateStringOptions;
 export declare type PropOptionsWithValidate = PropOptionsWithNumberValidate | PropOptionsWithStringValidate | VirtualOptions;
-export declare type RefType = number | string | mongoose.Types.ObjectId | Buffer;
+export declare type RefType = number | string | mongoose.Types.ObjectId | Buffer | undefined;
 export declare type RefSchemaType = typeof mongoose.Schema.Types.Number | typeof mongoose.Schema.Types.String | typeof mongoose.Schema.Types.Buffer | typeof mongoose.Schema.Types.ObjectId;
 /**
  * Reference another Model
  * @public
  */
-export declare type Ref<R, T extends RefType = R extends {
-    _id: RefType;
-} ? R['_id'] : mongoose.Types.ObjectId> = R | T;
+export declare type Ref<
+  R extends { _id: RefType },
+  T extends RefType = NonNullable<Pick<R, "_id">> extends { _id: RefType } ? R["_id"] : mongoose.Types.ObjectId
+> = R | T;
+
 /**
  * An Function type for a function that doesn't have any arguments and doesn't return anything
  */