Enumerable<T>.repeat constructor
Creates an enumerable
A convenience factory to create an enumerable by repeating value
count
number of times.
count
must be a non-negative number.
Implementation
factory Enumerable.repeat(T value, int count) {
if (count < 0)
throw ArgumentError('`count` must be a non-negative integer.');
if (count == 0) return Enumerable<T>.empty();
return RepeatEnumerable<T>(value, count);
}