{motive : Lean.Meta.LibrarySearch.DeclMod → Sort u} →
  motive Lean.Meta.LibrarySearch.DeclMod.none →
    motive Lean.Meta.LibrarySearch.DeclMod.mp →
      motive Lean.Meta.LibrarySearch.DeclMod.mpr → (t : Lean.Meta.LibrarySearch.DeclMod) → motive t