/** Stringifies a Map in a stable fashion. */
public static <K extends Comparable<K>, V> void toStringSorted(
Map<K, V> map, StringBuilder builder) {
builder.append('{');
List<Entry<K, V>> sortedProperties = Maps.sortedEntries(map);
int index = 0;
for (Entry<K, V> entry : sortedProperties) {
if (index > 0) {
builder.append(", ");
}
builder.append(entry.getKey()).append('=').append(entry.getValue());
index++;
}
builder.append('}');
}
