compareTo method
Compares this object to another object.
Returns a value like a Comparator when comparing this to other.
That is, it returns a negative integer if this is ordered before other,
a positive integer if this is ordered after other,
and zero if this and other are ordered together.
The other argument must be a value that is comparable to this object.
Implementation
@override
int compareTo(CompositeIndexKey other) {
final n =
parts.length < other.parts.length ? parts.length : other.parts.length;
for (var i = 0; i < n; i++) {
final c = compareValues(parts[i], other.parts[i]);
if (c != 0) return c;
}
return parts.length.compareTo(other.parts.length);
}