1 files changed, 19 insertions, 0 deletions
diff --git a/platform/script-debugger/protocol/protocol-reader-runtime/src/org/jetbrains/jsonProtocol/JsonOptionalField.java b/platform/script-debugger/protocol/protocol-reader-runtime/src/org/jetbrains/jsonProtocol/JsonOptionalField.java
new file mode 100644
index 000000000000..92c9cd978700
--- /dev/null
+++ b/platform/script-debugger/protocol/protocol-reader-runtime/src/org/jetbrains/jsonProtocol/JsonOptionalField.java
@@ -0,0 +1,19 @@
+// Copyright (c) 2009 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+package org.jetbrains.jsonProtocol;
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+/**
+ * For field-reading method specifies that the field is optional and may safely be absent in
+ * JSON object. By default fields are not optional.
+ */
+@Target({ElementType.METHOD})
+@Retention(RetentionPolicy.RUNTIME)
+public @interface JsonOptionalField {
+}