ExperimentalOptional Readonly ExperimentalcountRow count behind the value, when it differs from value.
Readonly ExperimentalfilterRaw field value used to build the linked filter clause. Distinct from
label, which may be localized or truncated. null selects the
null bucket via an is-null clause.
Readonly ExperimentalkeyReadonly ExperimentallabelOptional Readonly ExperimentaloverflowTrue for a producer-supplied "other"/overflow bucket, which cannot filter.
Optional Readonly ExperimentaltargetsFeature targets this mark stands for, when the producer can enumerate them cheaply. Enables mark-click to drive map/table selection directly instead of only filtering.
Readonly ExperimentalvalueMeasured value. null means "no value" and must render as an explicit
gap — never as 0 — unless the null policy is counted-as-zero.
One category / group-by bucket.