∀ (stx : Lean.Syntax) (ci : Lean.Elab.ContextInfo) (mctxBefore mctxAfter : Lean.MetavarContext)
  (goalsTargetedBy goalsCreatedBy : List Lean.MVarId),
  sizeOf
      { stx := stx, ci := ci, mctxBefore := mctxBefore, mctxAfter := mctxAfter, goalsTargetedBy := goalsTargetedBy,
        goalsCreatedBy := goalsCreatedBy } =
    1 + sizeOf stx + sizeOf ci + sizeOf mctxBefore + sizeOf mctxAfter + sizeOf goalsTargetedBy + sizeOf goalsCreatedBy