var shitList = {};

shitList.shitList = function (hostname) {
  var values = {};
  values[hostname] = true;

  return new Promise(function (resolve, reject) {
    chrome.storage.sync.set(values, function (results) {
      resolve();
    });
  });
}.bind(shitList);

shitList.deShitList = function (hostname) {

  return new Promise(function (resolve, reject) {
    chrome.storage.sync.remove(hostname, function (results) {
      resolve();
    });
  });
}.bind(shitList);

module.exports = shitList;

@@ -466,16 +466,305 @@
 List);%0A%0A
+shitList.isShitListed = function (hostname) %7B%0A  return new Promise(function (resolve, reject) %7B%0A    chrome.storage.sync.get(hostname, function (results) %7B%0A      if (results%5Bhostname%5D) %7B%0A        resolve(true);%0A      %7D else %7B%0A        resolve(false);%0A      %7D%0A    %7D);%0A  %7D);%0A%7D.bind(shitList);%0A%0A
 module.e

Add isShitListed function.