{
    'main1_overwritten_by_sub1_scalar' => 'o1',
    'main1_overwritten_by_sub1_array' => [
        'o1',
        'o2',
        {
            'o3' => 'o4'
        }
    ],
    'main1_overwritten_by_sub1_hash' => {
        'o1' => 'o2',
        'o3' => [
            'o4',
            'o5',
            'o6'
        ]
    }
};