A facet value which contains value names and their count.
This message has oneof_ fields (mutually exclusive fields).
For each oneof, at most one member field can be set at the same time.
Setting any member of the oneof automatically clears all other
members.
str
Text value of a facet, such as "Black" for
facet "colors".
This field is a member of oneof_ facet_value.
interval
google.cloud.discoveryengine_v1beta.types.Interval
Interval value for a facet, such as [10, 20) for facet
"price". It matches
SearchRequest.FacetSpec.FacetKey.intervals.
This field is a member of oneof_ facet_value.