public function addIn($field, $values, $whereConcat = 'AND')
    {
        if (!is_array($values)) {
            return $this;
        }

        $field = (0 < count($this->wheres) ? ' ' . $whereConcat . ' ' . $field : $field);

        //~ Bind values (more safety)
        $index  = 1;
        $fields = array();
        foreach ($values as $value) {

            $name = ':value_' . $index;

            $fields[]           = $name;
            $this->binds[$name] = (string) $value;

            $index++;
        }

        $this->wheres[] = $field . ' IN (' . implode(',', $fields) . ')';

        return $this;
    }