This file is indexed.

/usr/lib/slic3r-prusa3d/Slic3r/Polygon.pm is in slic3r-prusa 1.39.1+dfsg-3.

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package Slic3r::Polygon;
use strict;
use warnings;

# a polygon is a closed polyline.
use parent 'Slic3r::Polyline';

sub grow {
    my $self = shift;
    return $self->split_at_first_point->grow(@_);
}

1;