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my @info;
my $button_submit = $lf->Button(
    -text => 'Search',
    -command => [\&get_data, \@info],
)->pack(qw//);

my @info;
my $button_submit = $lf->Button(
    -text => 'Search',
...
    # call configure on the widget
    $tkwidget_ref->configure(...);
}