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-rw-r--r--bitbake/lib/bb/COW.py3
1 files changed, 3 insertions, 0 deletions
diff --git a/bitbake/lib/bb/COW.py b/bitbake/lib/bb/COW.py
index b0afb5fa0..ccb7cde3b 100644
--- a/bitbake/lib/bb/COW.py
+++ b/bitbake/lib/bb/COW.py
@@ -119,6 +119,9 @@ class COWDictMeta(COWMeta):
key += MUTABLE
delattr(cls, key)
+ def __contains__(cls, key):
+ return cls.has_key(key)
+
def has_key(cls, key):
value = cls.__getreadonly__(key, cls.__marker__)
if value is cls.__marker__: