Mark ab/7061308 as merged in stage.

Bug: 180401296
Merged-In: If12ffe9f83fef4bdb4e7edc24ac28d03455a0982
Change-Id: Icd3d2d1f98a3333bef18432113a1391f30e20551
diff --git a/default-treewalker-checks.xml b/default-treewalker-checks.xml
index 7e09891..08bd019 100644
--- a/default-treewalker-checks.xml
+++ b/default-treewalker-checks.xml
@@ -117,6 +117,7 @@
   <property name="severity" value="error"/>
   <property name="tokens" value="ASSIGN, BAND, BAND_ASSIGN, BOR, BOR_ASSIGN, BSR, BSR_ASSIGN, BXOR, BXOR_ASSIGN, COLON, DIV, DIV_ASSIGN, EQUAL, GE, GT, LAND, LE, LITERAL_ASSERT, LITERAL_CATCH, LITERAL_DO, LITERAL_ELSE, LITERAL_FINALLY, LITERAL_FOR, LITERAL_IF, LITERAL_RETURN, LITERAL_SYNCHRONIZED, LITERAL_TRY, LITERAL_WHILE, LOR, LT, MINUS, MINUS_ASSIGN, MOD, MOD_ASSIGN, NOT_EQUAL, PLUS, PLUS_ASSIGN, QUESTION, SL, SLIST, SL_ASSIGN, SR, SR_ASSIGN, STAR, STAR_ASSIGN, TYPE_EXTENSION_AND" />
   <property name="allowEmptyConstructors" value="true"/>
+  <property name="allowEmptyLambdas" value="true"/>
   <property name="allowEmptyMethods" value="true"/>
 </module>
 <module name="WhitespaceAfter">