def at_least_two_1
import bend-collections@1.0.0.0/src/containers/internal/intrusive_list.bend as IntrusiveListimport Base
125def at_least_two_1(~S: Type, ~N: Data, ~H: Data, ~get_head: S -> H -> S & Maybe<&2, N>, ~next: S -> N -> S & Maybe<&2, N>, r: S & Maybe<&2, N>) -> S & Bool:
126 (s, +head) = r
127 two_head(~S, ~N, ~next, s, head)