in lib/src/emitter.dart [673:690]
bool _newLineBetween(bool ordered, Directive? a, Directive? b) {
if (!ordered) return false;
if (a == null) return false;
assert(b != null);
// Put a line between imports and exports
if (a.type != b!.type) return true;
// Within exports, don't put in extra blank lines
if (a.type == DirectiveType.export) {
assert(b.type == DirectiveType.export);
return false;
}
// Return `true` if the schemes for [a] and [b] are different
return !Uri.parse(a.url).isScheme(Uri.parse(b.url).scheme);
}