public function getNumTraits()
{
if ($this->numTraits === null) {
$this->numTraits = 0;
foreach ($this->traits as $trait) {
foreach ($trait['methods'] as $method) {
if ($method['executableLines'] > 0) {
$this->numTraits++;
continue 2;
}
}
}
}
return $this->numTraits;
}