Strict sibling of signingDescriptorIndex: undefined instead of the 0 fallback, for callers that must tell "no parseable index" apart from index 0 — a watermark move mapped to 0 would move nothing while reporting success.
undefined
Strict sibling of signingDescriptorIndex:
undefinedinstead of the 0 fallback, for callers that must tell "no parseable index" apart from index 0 — a watermark move mapped to 0 would move nothing while reporting success.