chromium/out/Default/gen/v8/torque-generated/src/objects/js-duration-format-tq.inc

class JSDurationFormat;
// Alias for IsJSDurationFormat() that avoids inlining.
// https://source.chromium.org/chromium/chromium/src/+/main:v8/src/objects/js-duration-format.tq?l=43&c=1
V8_EXPORT_PRIVATE bool IsJSDurationFormat_NonInline(Tagged<HeapObject> o);

// Definition https://source.chromium.org/chromium/chromium/src/+/main:v8/src/objects/js-duration-format.tq?l=43&c=1
template <class D, class P>
class TorqueGeneratedJSDurationFormat : public P { … };