Private ReadonlysignalsPrivatecontrollerPrivate ReadonlyprobesPrivate ReadonlyfanThe abort signal governing a chunk read now (see the module notes). When
the last call returns normally, the composite aborts with an AbortError.
The residency probe a chunk read records into now (see the module notes).
PrivaterefreshPrivateinheritPrivateregisterRun one demand load with a fresh residency probe attached, reporting
whether it was served entirely from cache (a load that touches no chunks
counts as resident). The shared body of updateViewWithResidency.
The set of demand loads currently running on one leaf loader, published to its L0 proxies as one merged abort signal and one fanned-out residency probe (see the module notes for the merge rules). The first caller with a decode origin sets the composite's origin for the overlap episode. Its fetch priority can only rise, including after a higher-priority caller leaves.