# Compensate for delayed/conditional load of Data::Dumper.
package Data::Dumper {
   our $Indent;  # Avoids `used only once` warnings.
   sub Dumper;   # Avoids having to use parens.
}

# Demo
require Data::Dumper;
$Data::Dumper::Indent = 0;
print Data::Dumper::Dumper $data;
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If you want to import,

# Compensate for delayed/conditional load of Data::Dumper.
package Data::Dumper {
   our $Indent;  # Avoids `used only once` warnings.
}

sub Dumper;  # Avoids having to use parens.

# Demo
require Data::Dumper;
import Data::Dumper;
$Data::Dumper::Indent = 0;
print Dumper $data;
[download]

The sub declarations can also be used to provide the prototype.