contains<T> method
Implementation
bool contains<T>({T? value}) {
if (value != null) {
for (int i = 0; i < list.length; i++) {
dynamic e = list[i];
if (e == value) {
return true;
}
}
}
for (int i = 0; i < list.length; i++) {
dynamic e = list[i];
if (e is T) {
return true;
}
}
return false;
}