product/product.py doubt: is normal to see the same field twice in _defaults?

the 'type' field of product_template class appears twice in _defaults. is that normal?

thanks!

http://bazaar.launchpad.net/~openerp/openobject-addons/6.0/view/3775/product/product.py#L311

294
    _defaults = {
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        'company_id': lambda s,cr,uid,c: s.pool.get('res.company')._company_default_get(cr, uid, 'product.template', context=c),
***296* **
        'type': lambda *a: 'product',
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        'list_price': lambda *a: 1,
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        'cost_method': lambda *a: 'standard',
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        'supply_method': lambda *a: 'buy',
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        'standard_price': lambda *a: 1,
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        'sale_ok': lambda *a: 1,
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        'sale_delay': lambda *a: 7,
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        'produce_delay': lambda *a: 1,
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        'purchase_ok': lambda *a: 1,
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        'procure_method': lambda *a: 'make_to_stock',
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        'uom_id': _get_uom_id,
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        'uom_po_id': _get_uom_id,
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        'uos_coeff' : lambda *a: 1.0,
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        'mes_type' : lambda *a: 'fixed',
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        'categ_id' : _default_category,
***311* **
        'type' : lambda *a: 'consu',
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    }