Limit and filter images

]]>
Manual filtering and editing
]]>
 {
  if (this.fileCounter % 2 === 0) {
    metadata.abort = true;
  } else {
    // mutate the file or replace it entirely - metadata.file
    metadata.url = 'http://somewhereelse.com'
  }

  this.fileCounter++;
  return metadata;
};]]>