TWO_LETTER_ISO_8601_TIME_ZONE_FORMAT constant

List<String> const TWO_LETTER_ISO_8601_TIME_ZONE_FORMAT

here the ZoneOffset is managed manually to add the colon(:) between two digit hours and two digit minutes

Implementation

static const List<String> TWO_LETTER_ISO_8601_TIME_ZONE_FORMAT = [
  'yyyy',
  '-',
  'mm',
  '-',
  'dd',
  'T',
  'HH',
  ':',
  'nn',
  ':',
  'ss',
  '.',
  'SSS',
  'z'
];