{motive : Simps.ProjectionData → Sort u} →
  (t : Simps.ProjectionData) →
    ((name : Lean.Name) →
        (expr : Lean.Expr) →
          (projNrs : List ℕ) →
            (isDefault isPrefix : Bool) →
              motive { name := name, expr := expr, projNrs := projNrs, isDefault := isDefault, isPrefix := isPrefix }) →
      motive t