function tokenURI(uint256 _tokenId) public view override returns (string memory) {
  // A token without an owner doesn't have a URI.
  if (_owners[_tokenId] == address(0)) return ''; // @audit-info Should throw instead of returning an empty string

  // Get a reference to the URI resolver.
  IJBTokenUriResolver _resolver = store.tokenUriResolverOf(address(this));

  // If a token URI resolver is provided, use it to resolve the token URI.
  if (address(_resolver) != address(0)) return _resolver.getUri(_tokenId);

  // Return the token URI for the token's tier.
  return
    JBIpfsDecoder.decode(
      store.baseUriOf(address(this)),
      store.encodedTierIPFSUriOf(address(this), _tokenId)
    );
}
