buildClientSchema: build enum type value maps lazily

Author: yaacovCR

src/utilities/buildClientSchema.ts

@@ -284,14 +284,15 @@ export function buildClientSchema(
     return new GraphQLEnumType({
       name: enumIntrospection.name,
       description: enumIntrospection.description,
-      values: keyValMap(
-        enumIntrospection.enumValues,
-        (valueIntrospection) => valueIntrospection.name,
-        (valueIntrospection) => ({
-          description: valueIntrospection.description,
-          deprecationReason: valueIntrospection.deprecationReason,
-        }),
-      ),
+      values: () =>
+        keyValMap(
+          enumIntrospection.enumValues,
+          (valueIntrospection) => valueIntrospection.name,
+          (valueIntrospection) => ({
+            description: valueIntrospection.description,
+            deprecationReason: valueIntrospection.deprecationReason,
+          }),
+        ),
     });
   }