{
  safe: (val) => (val != null ? '' + val : ''),
  format_issue: (r) => (r.key != null ? r.key + ': ' : '') + (r.fields != null && r.fields.summary != null ? r.fields.summary : 'Issue ' + r.id),
  format_created: (r) => 'Created ' + (r.key != null ? r.key : 'issue ' + r.id),
  format_updated: (id) => 'Updated issue ' + id,
  format_deleted: (id) => 'Deleted issue ' + id,
  format_transitioned: (id, name) => 'Transitioned issue ' + id + (name != null ? ' to ' + name : ''),
  format_linked: (inward, outward, type) => 'Linked ' + inward + ' \u2192 ' + type + ' \u2192 ' + outward
}
