Custom attribute values that are either filterable or non-filterable.
Optional but exactly one of [string_values][google.cloud.tale
nt.v4beta1.CustomAttribute.string_values] or [long_values][g
oogle.cloud.talent.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.cloud.talent.v4beta1.CustomAttribute.long_values] is
supported.