presto-hive/src/main/java/io/prestosql/plugin/hive/metastore/PrincipalPrivileges.java/PrincipalPrivileges/PrincipalPrivileges
class PrincipalPrivileges:    public PrincipalPrivileges(
            Multimap<String, HivePrivilegeInfo> userPrivileges,
            Multimap<String, HivePrivilegeInfo> rolePrivileges)
    {
        this.userPrivileges = ImmutableSetMultimap.copyOf(requireNonNull(userPrivileges, "userPrivileges is null"));
        this.rolePrivileges = ImmutableSetMultimap.copyOf(requireNonNull(rolePrivileges, "rolePrivileges is null"));
    }