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chromium/content/test/data/accessibility/html/contenteditable-with-no-descendants-expected-mac.txt 

AXWebArea
++AXGroup AXDescription='label'
++AXGroup accessibilityCustomContent=[{label: 'description', value: 'description'}]
++AXGroup AXDescription='title'
++AXGroup
++++AXStaticText AXValue='description'