Add convenience functions to produce CheckSchemaResult values

lib/entry-points.js

@@ -144527,7 +144527,7 @@ function optionalOrNull(validator) {
     },
     check: (val, path29) => {
       if (val === void 0 || val === null) {
-        return { valid: true, unknownKeys: [] };
+        return successfulCheckSchema();
       }
       return validator.check(val, path29);
     },
@@ -144538,8 +144538,14 @@ function validateSchema(schema, obj) {
   const result = checkSchema(schema, obj, { failFast: true });
   return result.valid;
 }
+function successfulCheckSchema() {
+  return {
+    valid: true,
+    unknownKeys: []
+  };
+}
 function checkSchema(schema, obj, options = {}, path29 = "") {
-  const result = { valid: true, unknownKeys: [] };
+  const result = successfulCheckSchema();
   const inputKeys = new Set(Object.keys(obj));
   for (const [key, validator] of Object.entries(schema)) {
     const hasKey = key in obj;