observe property
Observe
Implementation
int? get observe {
final opt = getFirstOption(OptionType.observe);
return opt?.value as int?;
}
Implementation
@internal
set observe(final int? value) {
if (value == null) {
removeOptions(OptionType.observe);
} else if (value < 0 || ((1 << 24) - 1) < value) {
throw ArgumentError.value(
value,
'Message::observe',
'Observe option must be between 0 and '
'${(1 << 24) - 1} (3 bytes) inclusive',
);
} else {
setOption(CoapOption.createVal(OptionType.observe, value));
}
}