arrow-optics / arrow.optics / PIso / mapToSet
@JvmStatic fun <K> mapToSet(): Iso<Map<K, Unit>, Set<K>>
@JvmStatic fun <K> mapToSet():
Iso
<
Map
<K,
Unit
>,
Set
<K>>
Iso that defines the equality between a Unit value Map and a Set with its keys
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