trace_if_needed.cpp:9:1: warning: [blink-gc] Class 'TemplatedObject<blink::Member<blink::HeapObject> >' has untraced fields that require tracing.
template<typename T>
^
./trace_if_needed.h:20:5: note: [blink-gc] Untraced field 'm_two' declared here:
    T m_two;
    ^
1 warning generated.