1fields_require_tracing.cpp:9:1: warning: [blink-gc] Class 'PartObject' has untraced fields that require tracing. 2void PartObject::Trace(Visitor* visitor) { 3^ 4./fields_require_tracing.h:29:5: note: [blink-gc] Untraced field 'm_obj1' declared here: 5 Member<HeapObject> m_obj1; 6 ^ 7./fields_require_tracing.h:31:5: note: [blink-gc] Untraced field 'm_obj3' declared here: 8 Member<HeapObject> m_obj3; 9 ^ 10fields_require_tracing.cpp:16:1: warning: [blink-gc] Class 'PartBObject' has untraced fields that require tracing. 11void PartBObject::Trace(Visitor* visitor) { 12^ 13./fields_require_tracing.h:20:5: note: [blink-gc] Untraced field 'm_set' declared here: 14 HeapHashSet<PartBObject> m_set; 15 ^ 16fields_require_tracing.cpp:21:1: warning: [blink-gc] Class 'HeapObject' has untraced fields that require tracing. 17void HeapObject::Trace(Visitor* visitor) { 18^ 19./fields_require_tracing.h:40:5: note: [blink-gc] Untraced field 'm_part' declared here: 20 PartObject m_part; 21 ^ 223 warnings generated. 23