@register.tag
def get_static_prefix(parser, token):
    return PrefixNode.handle_token(parser, token, "STATIC_URL")
Credentials Controller
dataset/ETHPy150Open AppScale/appscale/AppServer/lib/django-1.3/django/templatetags/static.py/get_static_prefix--crossover with--dataset/ETHPy150Open sahana/eden/controllers/vol.py/credential