preferredExtnPrefix property
The preferred prefix when specifying an extension in this country. This is used for formatting only, and if this is not specified, a suitable default should be used instead. For example, if you wanted extensions to be formatted in the following way: 1 (365) 345 445 ext. 2345 " ext. " should be the preferred extension prefix.
Implementation
@$pb.TagNumber(13)
$core.String get preferredExtnPrefix => $_getSZ(12);