dolibarr/htdocs/includes/geoPHP/lib/geometry/MultiLineString.class.php

<?php
/**
 * MultiLineString: A collection of LineStrings
 */
class MultiLineString extends Collection
{
	protected $geom_type = 'MultiLineString';

	// MultiLineString is closed if all it's components are closed
	public function isClosed()
	{
		foreach ($this->components as $line) {
			if (!$line->isClosed()) {
				return false;
			}
		}
		return true;
	}
}