OwnerProduct.joined: def of bendvy-ecs-core@0.1.0.3
Import: import bendvy-ecs-core@0.1.0.3/owner_product.bend as OwnerProduct
Lines 36-38 of bendvy-ecs-core@0.1.0.3/owner_product.bend: https://jend.leeeet.dev/read.txt?path=bendvy-ecs-core@0.1.0.3/owner_product.bend&start_line=36&end_line=38

import Base

def joined(~A:Type,~B:Type,~P:Type,outer:A,observed:B & P) -> (A & B) & P:
  match observed:
    case (inner,part):((outer,inner),part)

Uses (2):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Pair
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Sigma