use strict;
use warnings;
# ...
{
  no warnings 'deprecated';
  %hash->{ silly } = 'foo';
}

##</code><code>##

use strict;
use warnings;
require Exporter;
{
  no warnings 'once';
  *import = \&Exporter::import;
}

##</code><code>##

Name "main::import" used only once: possible typo...

##</code><code>##

*import = *import = \&Exporter::import;