Elgg-Lorea-Hydra/mod/group_tools/views/default/widgets/group_related/edit.php

<?php
/**
 * Edit view of the related groups widget
 */

$widget = elgg_extract("entity", $vars);

$num_display = (int) $widget->num_display;
if ($num_display < 1) {
	$num_display = 4;
}

echo "<div>";
echo elgg_echo("widget:numbertodisplay");
echo elgg_view("input/text", array("name" => "params[num_display]", "value" => $num_display, "size" => "4", "maxlength" => "3"));
echo "</div>";