writeToSlot method
Writes text into slot slot, reallocating if the current capacity is
insufficient for the UTF-8 encoded length.
Always null-terminates the written string.
Implementation
@override
Pointer<Char> writeToSlot(int slot, String text, [int? bufferSize]) {
final requiredBytes = Length(text, bufferSize);
reallocSlotIfRequired(slot, requiredBytes);
final dst = stringSlots[slot]
.cast<Uint8>()
.asTypedList(requiredBytes);
dst.setAll(0, _lastBytes);
dst[_lastBytes.length] = 0;
return stringSlots[slot];
}