Return the correct pillar driver based on the file_client option

def get_async_pillar(opts, grains, minion_id, saltenv=None, ext=None, funcs=None,
                     pillar_override=None, pillarenv=None,
                     extra_minion_data=None):
    '''
    Return the correct pillar driver based on the file_client option
    '''
    file_client = opts['file_client']
    if opts.get('master_type') == 'disable' and file_client == 'remote':
        file_client = 'local'
    ptype = {
        'remote': AsyncRemotePillar,
        'local': AsyncPillar,
    }.get(file_client, AsyncPillar)
    return ptype(opts, grains, minion_id, saltenv, ext, functions=funcs,
                 pillar_override=pillar_override, pillarenv=pillarenv,
                 extra_minion_data=extra_minion_data)