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(ContextualResource<T, C> other) {
var c1 = context;
var c2 = other.context;
if (c1 != null && c2 == null) {
return -1;
} else if (c1 == null && c2 != null) {
return 1;
} else if (c1 == null && c2 == null) {
return 0;
} else {
return c1!.compareTo(c2!);
}
}