//! Fallback for targets without a known sequential-readahead hint
//! (BSDs, illumos, etc.). No-op — reads still work, they just don't
//! get the OS-level prefetch widening.
usestd::fs::File;pub(super)fnhint_sequential(_file:&File, _len_bytes:u64){}pub(super)fndrop_window(_file:&File, _start:u64, _len:u64){}pub(super)fnprefetch(_file:&File, _offset:u64, _len:u64){}