This is a temporary duplicate of the {@code getNationalSignificantNumber} method from {@code PhoneNumberUtil}. Ultimately a canonical static version should exist in a separate utility class (to prevent {@code ShortNumberInfo} needing to depend on PhoneNumberUtil).
protected getNationalSignificantNumber ( |
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$number | the phone number for which the national significant number is needed | |
return | string | the national significant number of the PhoneNumber object passed in |