message: Add some missing explicit declarations of template specializations in Obj
diff: @@ -435,8 +435,19 @@ private:
  std::ostream& operator<<(std::ostream&, const Obj& obj);
  +template <>
  +int64_t Obj::get(ColKey) const;
  +template <>
  +bool Obj::get(ColKey) const;
  +
  template <>
  int64_t Obj::_get(ColKey::Idx col_ndx) const;
  +template <>
  +StringData Obj::_get(ColKey::Idx col_ndx) const;
  +template <>
  +BinaryData Obj::_get(ColKey::Idx col_ndx) const;
  +template <>
  +ObjKey Obj::_get(ColKey::Idx col_ndx) const;
  struct Obj::FatPathElement {
  Obj obj; // Object which embeds...
  