The Find node, having been provided a key, searches a Map for your item, returning true if the Map contains the item, and subsequently returning the value if the item is found.
The Map that you want to search.
Item to Find
The key that you're using for the search.
If the key wasn't found in the Map, a default value will be constructed and returned.
Boolean Return Value
If the node finds the item in the Map, the node returns true. Otherwise, if the node returns false, there is no item contained in the Map that uses the provided key.