tcn.lms.element.v1alpha1.Element.Process.ContactManagerSink.DeDuplicationFieldType(DeDuplicationFieldType)
(-- api-linter: core::0126::unspecified=disabled
aip.dev/not-precedent: We need to keep the numbering the same since this existed before we started aip . --)
DeDuplicationFieldType specifies the field type to use for identifying duplicate contacts.
"DE_DUPLICATION_FIELD_TYPE_PHONE_NUMBER"