import Lake open Lake DSL require proofwidgets from git "https://github.com/leanprover-community/ProofWidgets4" @ "ade8c50c8d1172b974738a01447c29bf6f85f7f8" require aesop from git "https://github.com/leanprover-community/aesop.git" @ "v4.10.0-rc1" require mathlib from git "https://github.com/leanprover-community/mathlib4" @ "v4.10.0-rc1" package Example @[default_target] lean_lib Example