Const
Multi-out / stateful back-write sentinel: "leave this parent untouched." Every non-SKIP slot is written verbatim, undefined included; a short array skips the trailing parents. (1→1 put always writes its one parent.)
SKIP
undefined
put
Multi-out / stateful back-write sentinel: "leave this parent untouched." Every non-
SKIPslot is written verbatim,undefinedincluded; a short array skips the trailing parents. (1→1putalways writes its one parent.)