code: function(xcConfigBuildFilePath) {
          let lines = fs.readFileSync(xcConfigBuildFilePath, 'utf8').split('\n');
          let paths = hookData.headerPaths;
  
          let headerSearchPathLineNumber;
  
          lines.forEach((l, i) => {
              if (l.indexOf('HEADER_SEARCH_PATHS') > -1) {
                  headerSearchPathLineNumber = i;
              }
          });
  
          if (headerSearchPathLineNumber) {
              for(let actualPath of paths) {
                  if (lines[headerSearchPathLineNumber].indexOf(actualPath) == -1) {
                      lines[headerSearchPathLineNumber] += ` ${actualPath}`;
                      console.log(`${actualPath} was added to the search paths`);
                  }
                  else {
                      console.log(`${actualPath} was already setup in build.xcconfig`);
                  }
              }
          }
          else {
              lines[lines.length - 1] = 'HEADER_SEARCH_PATHS = ';
              for(let actualPath of paths) {
                  lines[lines.length - 1] += actualPath;
              }
          }
  
          let newConfig = lines.join('\n');
  
          fs.writeFile(xcConfigBuildFilePath, newConfig, function (err) {
              if (err) {
                  console.log(`Error updating build.xcconfig: ${err}`);
                  return;
              }
              console.log('Successfully updated HEADER_SEARCH_PATHS in build.xcconfig');
          });
  
      }
docs: Read the build config, add the correct Header Search Paths to the config before calling modifyAppDelegate.