=== returns a True value if both operands are the same value. Otherwise, it returns False. This operator is also known as the value identity operator.
class I { }Â
# Three different instances
my $i = I.new;
my $ii = I.new;
my $iii = I.new;Â
my @a = ($i, $ii, $iii);
for @a -> $a {
   for @a -> $b {
       say $a === $b;
       # Prints True only when $a and $b are pointing
       # to the same element of the @a array.Â
   }
}