Custom attribute values that are either filterable or non-filterable.
Exactly one of [string_values][google.cloud.talent.v4beta1.Cu
stomAttribute.string_values] or [long_values][google.cloud.t
alent.v4beta1.CustomAttribute.long_values] must be specified.
This field is used to perform number range search. (EQ,
GT, GE, LE, LT) over filterable
long_value. Currently at most 1 [long_values][google.clo
ud.talent.v4beta1.CustomAttribute.long_values] is supported.