How to use MinkContext inside BehatBundle as subcontext

FeatureContext.php

<?php

namespace Acme\DemoBundle\Features\Context;

use Behat\BehatBundle\Context\BehatContext,
    Behat\Behat\Exception\PendingException;
use Behat\Gherkin\Node\PyStringNode,
    Behat\Gherkin\Node\TableNode;

/**
 * Feature context.
 */
class FeatureContext extends BehatContext
{
    /**
     * BehatBundle's main context constructor gets
     * KernelInterface instance as single parameter
     */
    public function __construct($kernel)
    {
        // Instantiate and use BehatBundle's MinkContext with provided $kernel
        $this->useContext('mink', new MinkContext($kernel));
    }

    /**
     * Get Mink session from MinkContext
     */
    public function getSession($name = null)
    {
        reutrn $this->getSubcontext('mink')->getSession($name);
    }
}

MinkContext.php

<?php

namespace Acme\DemoBundle\Features\Context;

use Behat\BehatBundle\Context\MinkContext as BaseMinkContext,
    Behat\Behat\Exception\PendingException;
use Behat\Gherkin\Node\PyStringNode,
    Behat\Gherkin\Node\TableNode;

/**
 * Mink-enabled context.
 */
class MinkContext extends BaseMinkContext
{
}

You have a typo in

    public function getSession($name = null)
    {
        reutrn $this->getSubcontext('mink')->getSession($name); // Should be 'return'
    }

Also thank you for your work on Behat/Mink