Function firstEntry

firstEntry<K, V>(
map: Data.Maps.IWithEntries<K, Iterable<V, any, any>>,
predicate: (value: V, key: K) => boolean,
): undefined | readonly [K, Iterable<V, any, any>]
Finds first entry by iterable value. Expects a map with an iterable as values.
```
const map = new Map();
map.set('hello', ['a', 'b', 'c']);
map.set('there', ['d', 'e', 'f']);

const entry = firstEntry(map, (value, key) => {
 return (value === 'e');
});
// Entry is: ['there', ['d', 'e', 'f']]
```
An alternative is firstEntryByValue to search by value.
Type Parameters
- K
- V
Parameters
- map: Data.Maps.IWithEntries<K, Iterable<V, any, any>>
  Map to search
- predicate: (value: V, key: K) => boolean
  Filter function returns true when there is a match of value
Returns undefined | readonly [K, Iterable<V, any, any>]
Entry, or undefined if filter function never returns true