ReqBrMobile constructor
Validates masked and unmasked (with or without '+55' prefix) Brazilian mobile numbers.
blank
the error message in case of a null or empty mobile number.
mal
the error message in case of a malformed number.
Implementation
ReqBrMobile({String? blank, String? mal})
: _reqBrMobile = Pair.str2(Req(blank: blank), BrMobile(mal: mal));