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bool-only
Combined from primary sources listed below.

In role PredictiveIterator§

See primary documentation in context for method bool-only

Defaults to the Booleanification of the result of calling the count-only method. If it is possible to have a faster way of finding out whether the iterator is capable of producing any value, it should be implemented.

method bool-only(--> Bool:D) { self.count-only.Bool }