'Get configuration in BGP_EVPN view'

def get_config_in_bgp_evpn_view(self):

    self.bgp_evpn_config = ''
    if (not self.config):
        return ''
    index = self.config.find('l2vpn-family    evpn')
    if (index == (-1)):
        return ''
    return self.config[index:]
