code: func GetTree(s storer.EncodedObjectStorer, h plumbing.Hash) (*Tree, error) {
  	o, err := s.EncodedObject(plumbing.TreeObject, h)
  	if err != nil {
  		return nil, err
  	}
  
  	return DecodeTree(s, o)
  }
docs: // GetTree gets a tree from an object storer and decodes it.