package One;

use strict;
use warnings;

# --- option 1 - inheritance via @ISA
# require Exporter;
# our @ISA = qw(Exporter);
# ---

# --- option 2 - inheritance via use base ...
# use base "Exporter";
# ---

# --- option 3 - directly import Exporter's import()
use Exporter "import";
# ---

# ( @EXPORT or @EXPORT_OK always needed )
our @EXPORT = qw(method1);

sub method1 {
    print "method1 greets hello";
}

1;