a-foundation/src/main/java/com/ajjpj/afoundation/collection/immutable/AHashMap.java
@SuppressWarnings("unused")
    public static <K,V> AHashMap<K,V> fromJavaUtilMap(Map<K,V> map) {
        return fromJavaUtilMap(DEFAULT_EQUALITY, map);
    }
@SuppressWarnings("unused")
    public static <K,V> AHashMap<K,V> fromJavaUtilMap(Map<K,V> map) {
        return fromJavaUtilMap(DEFAULT_EQUALITY, map);
    }
Returns an AHashMap instance with default (i.e. equals-based) equalityForEquals, initializing it from the contents of
a given <code>java.util.Map</code>.