library/Rediska/Connection/Exec.php
public function setResponseCallback($callback)
    {
        if ($callback !== null && !is_callable($callback)) {
            throw new Rediska_Connection_Exec_Exception('Bad callback');
        }

        $this->_responseCallback = $callback;

        return $this;
    }
public function setResponseCallback($callback)
    {
        if ($callback !== null && !is_callable($callback)) {
            throw new Rediska_Connection_Exec_Exception('Bad callback');
        }

        $this->_responseCallback = $callback;

        return $this;
    }
Set response callback

@param mixin $callback
@return Rediska_Connection_Exec