 vertex
--
--   Note that this corresponds to √(maxBound ∷ Int), so
--   on 32-Bit systems, this is 46'339, while on 64-Bit
--   systems, it is 3'037'000'498.
maxVertex ∷ Vertex
maxVertex = Vertex maxVAsInt


isValidVertex ∷ Int → Bool

maxVertex ∷ Vertex
maxVertex = Vertex maxVAsInt
maxVertex = Vertex maxVAsInt