code: function buildString(file, enc, cb) {
  		var currentFilePath = file.path;
  		var fileName = getFileName(currentFilePath);
  
  		//don't read the destination path (if in same folder)
  		if (fileName === destFileName || file.isNull()) {
  			cb();
  			return;
  		}
  
  		if (file.isStream()) {
  			cb(new PluginError(PLUGIN_NAME, 'Streaming not supported'));
  			return;
  		}
  
  		addImportToList(currentFilePath, file, fileName, opts);
  		return cb();
  	}
docs: /* main function