def _update_contentmodel(page, pagedict):
    """Update page content model."""
    page._contentmodel = pagedict.get('contentmodel')
    if (page._contentmodel and page._contentmodel == 'proofread-page' and 
        'proofread' in pagedict):
        page._quality = pagedict['proofread']['quality']
        page._quality_text = pagedict['proofread']['quality_text']
