my $val = Dive(\%b, map \$_, @a);
DiveVal(\%b, map \$_, @a)= $val;

##</code><code>##

my $val = Dive(\%b, map \$_, @a);
DiveVal(\%b, map \$_, @a) = $val;

##</code><code>##

my $val = Dive(\%b, @a);
DiveVal(\%b, @a) = $val;