How to use gettext-parser

function parsePoFile(filePath) {
  const content = fs.readFileSync(filePath);
  return gettextParser.po.parse(content);
}

Object.keys(po.headers || {}).map((k) => {
   return {key: k, value: po.headers[k]};
  })

Object.keys(po.translations).forEach((ck) => {
   Object.keys(po.translations[ck]).forEach((id) => {
    if (id !== '') {
     let md5 = crypto.createHash('md5');
     let msg = po.translations[ck][id];
     let obj = {extensions: []};
     if (msg.msgctxt && msg.msgctxt != '') {
      md5.update(msg.msgctxt + '\u0000' + msg.msgid, 'utf-8');
     } else
      md5.update(msg.msgid, 'utf-8');
     let oid = md5.digest('hex');
      obj.id = oid;
      obj.extensions.push({'object-type': 'pot-entry-header',
                 references: msg.comments && msg.comments.reference ? msg.comments.reference.split('\n') : [],
                 flags: msg.comments && msg.comments.flag ? msg.comments.flag.split(',') : [],
                 context: msg.msgctxt ? msg.msgctxt : ''});
      if (msg.comments && msg.comments.extracted)
       obj.extensions.push({'object-type': 'comment',
                  value: msg.comments.extracted,
                  space: 'preserve'});
      if (msg.msgid_plural) {
       obj.plural = true;
       obj.contents = [msg.msgid, msg.msgid_plural];
      } else {
       obj.plural = false;
       obj.content = msg.msgid;
      if (msg.comments && msg.comments.flag && msg.comments.flag.match('fuzzy'))