Attempt to document Map.antipairs

gistfile1.txt

=head2 method antipairs

Defined as:

    method antipairs(Map:D:) returns Seq:D

Returns all keys and their respective values as a L<Seq|/type/Seq> of C<Pair>s
where the keys and values have been exchanged, i.e. the opposite of method
L<pairs|#method_pairs>. Unlike the L<invert|#method_invert> method, there is
no attempt to expand list values into multiple pairs.

    my $m = Map.new('a' => (2, 3), 'b' => 17);
    say $m.antipairs;                                 # ((2 3) => a 17 => b)