law pieces_length
import lawful-fields@0.1.1.0/proof_list.bend as ProofListimport Base
import lawful-fields@0.1.1.0/defs.bend as F
425law pieces_length:
426 for +es: List<&2, U32>
427 for +xs: List<&2, U32>
428 for +from: Nat
429 {List.length(&2, List<&2, U32>, F.pieces(es, xs, from)) == List.length(&2, U32, es) : Nat}