getPosition method

int getPosition(
  1. GroupRef ref
)

Implementation

int getPosition(GroupRef ref) {
  if (!_positions.containsKey(ref)) {
    var ignoredHint = _previouslyIgnoredRefs.contains(ref) ?
      " (It was previously tracked, then later ignored.)" : "";
    throw ArgumentError("Position not tracked for ref!$ignoredHint", "ref");
  }
  ref._positionUsed = true;
  return _positions[ref]!;
}