old_contents: import prop from './prop';
  
  export default function propfind(object) {
    return `<d:propfind xmlns:c="urn:ietf:params:xml:ns:caldav"
                xmlns:card="urn:ietf:params:xml:ns:carddav"
                xmlns:cs="http://calendarserver.org/ns/"
                xmlns:d="DAV:">
      <d:prop>
        ${object.props.map(prop)}
      </d:prop>
    </d:propfind>`;
  }
  
new_contents: import prop from './prop';
  
  export default function propfind(object) {
    return `<d:propfind xmlns:c="urn:ietf:params:xml:ns:caldav"
                xmlns:card="urn:ietf:params:xml:ns:carddav"
                xmlns:cs="http://calendarserver.org/ns/"
                xmlns:ca="http://apple.com/ns/ical/"
                xmlns:d="DAV:">
      <d:prop>
        ${object.props.map(prop)}
      </d:prop>
    </d:propfind>`;
  }
  
subject: add missing apple namespace