Function setMapAdd

setMapAdd<T, K>(map: Map<K, Set<T>>, key: K, value: T): Set<T>
Add a value to an Set inside of a map; if the array is not created create it and then push the value
Type Parameters
- T
- K
Parameters
- map: Map<K, Set<T>>
  Map of Set's
- key: K
  Key in the map
- value: T
  Value to add to the array
Returns Set<T>
- Defined in packages/util/src/collection.ts:353