code: function fileExists(file) {
      try {
          var targetStat = fs.statSync(file);
          if (targetStat.isDirectory() ) {
              throw new Error("File exists but it's a driectory: " + file);
          }
      }
      catch(err) {
          if (err.code == 'ENOENT') {         // No such file or directory
              return false;
          }
          else {
              throw err;
          }
      }
      return true;
  }
docs: Checks if the file exists at the given path. Returns true if it exists, false otherwise.
  @private
  @param {string} file - Path of the file to check
  @returns {boolean}