Fixtures/Executor/ReferenceRepository.php
public function remove($key)
    {
        if (!$this->repository->containsKey($key))
            throw new ReferenceDoesNotExistException();
        $this->repository->remove($key);
        return $this;
    }
public function remove($key)
    {
        if (!$this->repository->containsKey($key))
            throw new ReferenceDoesNotExistException();
        $this->repository->remove($key);
        return $this;
    }
Removes a reference identified by $key

@param $key
@return $this
@throws ReferenceDoesNotExistException if no reference exists identified by specified key