src/client/components/referenceInputUtils/index.js
function getTotalCount(response) {
  let range = response.headers['content-range'];
  let index = range.indexOf('/');
  let totalCount = range.substring(index + 1);
  return parseInt(totalCount, 10);
}
function getTotalCount(response) {
  let range = response.headers['content-range'];
  let index = range.indexOf('/');
  let totalCount = range.substring(index + 1);
  return parseInt(totalCount, 10);
}
/*
Parses Content-range header and returns response count