function getMethod($methodName)
    {
        if (!$this->hasMethod($methodName))
            throw new \Exception(sprintf(
                'Method (%s) not found.'
                , $methodName
            ));

        if (isset($this->_t__methods[$methodName])) {
            ## from bind closure
            $methodCallable = $this->_t__methods[$methodName];
        } else {
            $bindTo = $this->getBindTo();
            $methodCallable = function() use($methodName, $bindTo) {
                return call_user_func_array([$bindTo, $methodName], func_get_args());
            };
        }

        ## bind it into latest bind object
        $methodCallable = \Closure::bind(
            $methodCallable
            , $this->getBindTo()
            , get_class($this->getBindTo())
        );

        return $methodCallable;
    }