code: public void setHostIdSet(java.util.Collection<String> hostIdSet) {
          if (hostIdSet == null) {
              this.hostIdSet = null;
              return;
          }
  
          this.hostIdSet = new com.amazonaws.internal.SdkInternalList<String>(hostIdSet);
      }
docs: <p>
  The IDs of the Dedicated Hosts associated with the reservation.
  </p>
  
  @param hostIdSet
  The IDs of the Dedicated Hosts associated with the reservation.