{"action":"created","comment":{"url":"https://api.github.com/repos/caskdata/cdap/pulls/comments/34435101","id":34435101,"diff_hunk":"@@ -92,13 +105,30 @@ void mergeToken(BasicWorkflowToken other) {\n \n   @Override\n   public void put(String key, String value) {\n-    if (nodeName == null) {\n-      throw new IllegalStateException(\"Node name cannot be null.\");\n+    put(key, Value.of(value));\n+  }\n+\n+  @Override\n+  public void put(String key, Value value) {\n+    put(key, value, Scope.USER);\n+  }\n+\n+  void put(String key, Value value, Scope scope) {\n+    Preconditions.checkNotNull(key, \"Null key cannot be added in the WorkflowToken.\");\n+    Preconditions.checkNotNull(value, String.format(\"Null value provided for the key '%s'.\", key));\n+    Preconditions.checkNotNull(value.toString(), String.format(\"Null value provided for the key '%s'.\", key));\n+    Preconditions.checkState(nodeName != 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done.","created_at":"2015-07-13T06:01:27Z","updated_at":"2015-07-13T06:01:27Z","html_url":"https://github.com/caskdata/cdap/pull/3128#discussion_r34435101","pull_request_url":"https://api.github.com/repos/caskdata/cdap/pulls/3128","_links":{"self":{"href":"https://api.github.com/repos/caskdata/cdap/pulls/comments/34435101"},"html":{"href":"https://github.com/caskdata/cdap/pull/3128#discussion_r34435101"},"pull_request":{"href":"https://api.github.com/repos/caskdata/cdap/pulls/3128"}}},"pull_request":{"url":"https://api.github.com/repos/caskdata/cdap/pulls/3128","id":39635807,"html_url":"https://github.com/caskdata/cdap/pull/3128","diff_url":"https://github.com/caskdata/cdap/pull/3128.diff","patch_url":"https://github.com/caskdata/cdap/pull/3128.patch","issue_url":"https://api.github.com/repos/caskdata/cdap/issues/3128","number":3128,"state":"open","locked":false,"title":"Added scoping in the WorkflowToken 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