def shown_in
import minebender-game@1.0.0.0/proof_inv.bend as ProofInvimport Base
import minebender-game@1.0.0.0/types.bend as T
import minebender-game@1.0.0.0/board.bend as B
20def shown_in(g: T.Grid(Bool), q: T.Pos) -> Bool:
21 B.at(Bool, False{}, g, q)