public function isValidImplementation($implementation)
{
if ($implementation == 'n/a') {
return true;
}
if ($implementation == 'all') {
foreach ($this->_implementations as $imp => $value) {
if ($value == false) {
return false;
}
}
return true;
}
if (array_key_exists($implementation, $this->_implementations)) {
return $this->_implementations[$implementation];
}
return false;
}