One pair's outcome. Exactly one of nodeId/candidateId is set — candidateId is the id the node would have, so callers can keep addressing an unresolved pair by what it asked for. A pair with no candidate at all (an unknown key) is null.
nodeId
candidateId
null
Optional
One pair's outcome. Exactly one of
nodeId/candidateIdis set —candidateIdis the id the node would have, so callers can keep addressing an unresolved pair by what it asked for. A pair with no candidate at all (an unknown key) isnull.