@Override
  public ImmutableMap<String, ?> defaultValues(Map<String, ?> userProvidedDefaults) {
    Object userProvidedAcl = userProvidedDefaults.get("acl:acl");

    ImmutableList<AclEntry> acl = DEFAULT_ACL;
    if (userProvidedAcl != null) {
      acl = toAcl(checkType("acl", "acl", userProvidedAcl, List.class));
    }

    return ImmutableMap.of("acl:acl", acl);
  }
Attribute provider that provides the {@link AclFileAttributeView} ("acl").

@author Colin Decker
jimfs/src/main/java/com/google/common/jimfs/AclAttributeProvider.java