leadingDigitsPattern property
This field is a regex that is used to match a certain number of digits
at the beginning of the national (significant) number. When the match is
successful, the accompanying pattern and format should be used to format
this number. For example, if leading_digits="1-3|44", then all the
national numbers starting with 1, 2, 3 or 44 should be formatted using the
accompanying pattern and format.
The first leadingDigitsPattern matches up to the first three digits of the national (significant) number; the next one matches the first four digits, then the first five and so on, until the leadingDigitsPattern can uniquely identify one pattern and format to be used to format the number.
In the case when only one formatting pattern exists, no leading_digits_pattern is needed.
Implementation
@$pb.TagNumber(3)
$core.List<$core.String> get leadingDigitsPattern => $_getList(2);