Hal\MutaTesting\Mutation\MutationInterface::getUnit PHP Method

    public function getUnit();

 public function mutate(MutationInterface $original, $index)
 {
     $token = $original->getTokens()->offsetGet($index);
     if ($token->getType() !== T_ELSE) {
         throw new \UnexpectedValueException(sprintf('invalid token "%s" given in %s', token_name($token->getType()), get_class($this)));
     }
     // look for the closing bracket
     $tokens = $original->getTokens();
     $len = $tokens->count();
     $end = false;
     for ($i = $index; $i < $len; $i++) {
         $token = $tokens->offsetGet($i);
         if ($token->getType() === T_STRING && $token->getValue() === '}') {
             $end = $i;
             break;
         }
     }
     if (false === $end) {
         throw new \OutOfRangeException('closing bracket not found for else');
     }
     // remove all concerned tokens
     $tokens = $tokens->remove($index, $end);
     $new = new \Hal\MutaTesting\Mutation\Mutation();
     $new->setTokens($tokens)->setUnit($original->getUnit())->setSourceFile($original->getSourceFile())->setTestFile($original->getTestFile())->setMutedTokensIndexes(array_merge($original->getMutedTokensIndexes(), range($index, $end)));
     return $new;
 }