def prepend(self, env, name, values, kwargs):
    (sep, value) = self.get_value(values, kwargs)
    if (name in env):
        return ((value + sep) + env[name])
    return value
def prepend(self, env, name, values, kwargs):
    (sep, value) = self.get_value(values, kwargs)
    if (name in env):
        return ((value + sep) + env[name])
    return value