1 files changed, 5 insertions, 3 deletions
diff --git a/src/new_fields/Doc.ts b/src/new_fields/Doc.ts
index 38c220bc8..afcf71fc9 100644
--- a/src/new_fields/Doc.ts
+++ b/src/new_fields/Doc.ts
@@ -29,9 +29,11 @@ const SelfProxy = Symbol("SelfProxy");
 export const WidthSym = Symbol("Width");
 export const HeightSym = Symbol("Height");
 
-export function DocListCast(field: FieldResult) {
-    const list = Cast(field, listSpec(Doc))
-    return list ? Promise.all(list) : Promise.resolve(undefined);
+export function DocListCast(field: FieldResult): Promise<Doc[] | undefined>;
+export function DocListCast(field: FieldResult, defaultValue: Doc[]): Promise<Doc[]>;
+export function DocListCast(field: FieldResult, defaultValue?: Doc[]) {
+    const list = Cast(field, listSpec(Doc));
+    return list ? Promise.all(list) : Promise.resolve(defaultValue);
 }
 
 @Deserializable("doc").withFields(["id"])