function attachExistenceAssertion(PatchHandle $handle, $target)
{
$handle->addExpirationHandler(function () use($target) {
if (!Utils\callbackTargetDefined($target)) {
# Not using exceptions because this might happen during PHP shutdown
$message = "%s was never defined during the lifetime of its redefinition";
trigger_error(sprintf($message, Utils\callbackToString($target)), E_USER_WARNING);
}
});
}
function __construct($callback)
{
parent::__construct(sprintf($this->message, Utils\callbackToString($callback)));
}
