return +{
    'main2_overwritten_by_sub2_scalar' => 'n1',
    'main2_overwritten_by_sub2_hash' => {
        'n3' => 'n4',
        'n1' => 'n2'
    },
    'main1_overwritten_by_sub1_scalar' => 'n1',
    'main1_only_hash' => {
        'i1' => 'i2',
        'i3' => 'i4'
    },
    'main1_only_scalar' => 'i',
    'main2_only_scalar' => 'i',
    'main2_only_hash' => {
        'i1' => 'i2',
        'i3' => 'i4'
    },
    'main1_overwritten_by_sub1_hash' => {
        'n3' => 'n4',
        'n1' => 'n2'
    }
};