Uncaught (in promise) ReferenceError: getNFTNames is not defined

I am not so familiar with javascript, and i’m using someone else’s code, and added some new functions with parameters, and it’s throwing the following error

It’s somehow not recognizing the functions with parameters.

Uncaught (in promise) ReferenceError: getNFTNames is not defined

window.App = {
 start: function() {
  var self = this;

  Voting.setProvider(web3.currentProvider);
  NFTContract.setProvider(web3.currentProvider);
  self.populateNFTs();
 },

populateNFTs: function() {
  var self = this;
  NFTContract.deployed().then(function(contractInstance) {
    contractInstance.allNFTs.call().then(function(NFTArray) {
      for(let i=0; i < NFTArray.length; i++) {
        NFTs[NFTArray[i]] = "tokenID-" + i;
      }
      console.log("NFT Array = " + JSON.stringify(NFTs));
      self.setupNFTRows();
    })
  })
 },

 setupNFTRows: function() {
  Object.keys(NFTs).forEach(function (NFTid) { 
    $("#NFT-rows").append(
      `<tr id='NFT_ID_${NFTid}'>
          <td>NFT_ID_${NFTid}</td>
          <td>${this.getNFTNames(NFTid)}</td>
          <td>${this.getCreators(NFTid)}</td>
         </tr>`);
  });
},

getNFTNames:function (nftid){
  NFTContract.deployed().then(function(contractInstance) {
    contractInstance.getNFTname.call(nftid).then(function(v) {
      return v.toString();
    });
  });
}

}