protected function initNamespaceMetric(ASTNamespace $namespace)
{
$id = $namespace->getId();
if (!isset($this->nodeMetrics[$id])) {
$this->nodeSet[$id] = $namespace;
$this->nodeMetrics[$id] = array(self::M_NUMBER_OF_CLASSES => 0, self::M_NUMBER_OF_CONCRETE_CLASSES => 0, self::M_NUMBER_OF_ABSTRACT_CLASSES => 0, self::M_AFFERENT_COUPLING => array(), self::M_EFFERENT_COUPLING => array(), self::M_ABSTRACTION => 0, self::M_INSTABILITY => 0, self::M_DISTANCE => 0);
}
}