src/Zf2Forum/Mapper/UserMapper.php
public function fetchAll($columns = null, \Closure $Closure = null)
    {
        $select = $this->getSelect();
        if ($columns) {
            $select->columns($columns);
        }
        if ($Closure) {
            $Closure($select);
        }
        return $this->select($select);
    }
public function fetchAll($columns = null, \Closure $Closure = null)
    {
        $select = $this->getSelect();
        if ($columns) {
            $select->columns($columns);
        }
        if ($Closure) {
            $Closure($select);
        }
        return $this->select($select);
    }
gets users list

@param array                                     $columns columns to fetch from user table
@param callable|\PrivateMessaging\Mapper\Closure $Closure $Closure       to manipulate Select

@return \Zend\Db\ResultSet\ResultSet