docs: function findTab(patternlab, pattern) {
  
    //read the filetypes from the configuration
    const fileTypes = patternlab.config.plugins['plugin-node-tab'].options.tabsToAdd;
  
    //exit if either of these two parameters are missing
    if (!patternlab) {
      console.error('plugin-node-tab: patternlab object not provided to findTab');
      process.exit(1);
    }
  
    if (!pattern) {
      console.error('plugin-node-tab: pattern object not provided to findTab');
      process.exit(1);
    }
  
    //derive the custom filetype paths from the pattern relPath
    var customFileTypePath = path.join(patternlab.config.paths.source.patterns, pattern.relPath);
  
    //loop through all configured types
    for (let i = 0; i < fileTypes.length; i++) {
      const fileType = fileTypes[i].toLowerCase();
  
      customFileTypePath = customFileTypePath.substr(0, customFileTypePath.lastIndexOf(".")) + '.' + fileType;
      var customFileTypeOutputPath = patternlab.config.paths.public.patterns + pattern.getPatternLink(patternlab, 'custom', '.' + fileType);
  
      //look for a custom filetype for this template
      try {
        var tabFileName = path.resolve(customFileTypePath);
        try {
          var tabFileNameStats = fs.statSync(tabFileName);
        } catch (err) {
          //not a file - move on quietly
        }
        if (tabFileNameStats && tabFileNameStats.isFile()) {
          if (patternlab.config.debug) {
            console.log('plugin-node-tab: copied pattern-specific custom file for ' + pattern.patternPartial);
          }
  
          //copy the file to our output target if found
          fs.copySync(tabFileName, customFileTypeOutputPath);
        } else {
  
          //otherwise write nothing to the same location - this prevents GET errors on the tab.
          fs.outputFileSync(customFileTypeOutputPath, '');
        }
      }
      catch (err) {
        console.log('plugin-node-tab:There was an error parsing sibling JSON for ' + pattern.relPath);
        console.log(err);
      }
    }
  }