complement method
{@inheritDoc} */
Implementation
IntervalSet? complement(IntervalSet? vocabulary) {
if (vocabulary == null || vocabulary.isNil) {
return null; // nothing in common with null set
}
return vocabulary - this;
}
{@inheritDoc} */
IntervalSet? complement(IntervalSet? vocabulary) {
if (vocabulary == null || vocabulary.isNil) {
return null; // nothing in common with null set
}
return vocabulary - this;
}