@since Method available since Release 3.4.0
boolean $preserveGlobalState:
public function setPreserveGlobalState($preserveGlobalState) {
if (is_bool($preserveGlobalState)) {
$this->preserveGlobalState = $preserveGlobalState;
}
else {
throw PHPUnit_Util_InvalidArgumentHelper::factory(1, 'boolean');
}
}