fix errors after merging in main

TimWhiting · TimWhiting · commit 9dec114c695f · 2022-10-19T10:38:28.000-06:00
diff --git a/json_serializable/lib/src/type_helpers/json_helper.dart b/json_serializable/lib/src/type_helpers/json_helper.dart
@@ -380,7 +380,8 @@ class MapKeyHelper extends TypeHelper<TypeHelperContextWithConfig> {
 
     final toFromString = mapKeyHelperForType(keyArg);
     if (toFromString != null) {
-      keyUsage = toFromString.deserialize(keyArg, keyUsage, false, true)!;
+      keyUsage =
+          toFromString.deserialize(keyArg, keyUsage, false, true)!.toString();
     }
 
     return keyUsage;

Original file line number	Diff line number	Diff line change
`@@ -380,7 +380,8 @@ class MapKeyHelper extends TypeHelper<TypeHelperContextWithConfig> {`
`380`	`380`
`381`	`381`	`final toFromString = mapKeyHelperForType(keyArg);`
`382`	`382`	`if (toFromString != null) {`
`383`		`- keyUsage = toFromString.deserialize(keyArg, keyUsage, false, true)!;`
	`383`	`+ keyUsage =`
	`384`	`+ toFromString.deserialize(keyArg, keyUsage, false, true)!.toString();`
`384`	`385`	`}`
`385`	`386`
`386`	`387`	`return keyUsage;`