=head2 C<perl2yaml>

    my $yaml = perl2yaml($perlvar, $optional_paramshashref);

The C<perl2yaml> function does ...

Arguments:

=over 4

=item * C<$perlvar>

... C<$perlvar> description ...

=item * C<$optional_paramshashref>

... C<$optional_paramshashref> description ...

=back

Return value:

=over 4

=item * C<$yaml>

... C<$yaml> description ...

=back