export function flattenSections(sections: any[]): any[] {
  let a: any[] = []
  for (let i = 0; i < sections.length; i++) {
    if (sections[i].id) {
      // only push a section that has an id
      // these are reserved for sidebar subtitles
      a.push(sections[i])
    }
    if (sections[i].items) {
      // if there are subitems, loop through
      a = a.concat(flattenSections(sections[i].items))
    }
  }
  return a
}