code: public void setHostReservationSet(java.util.Collection<HostReservation> hostReservationSet) {
          if (hostReservationSet == null) {
              this.hostReservationSet = null;
              return;
          }
  
          this.hostReservationSet = new com.amazonaws.internal.SdkInternalList<HostReservation>(hostReservationSet);
      }
docs: <p>
  Details about the reservation's configuration.
  </p>
  
  @param hostReservationSet
  Details about the reservation's configuration.