code: public void setUnsuccessfulFleetDeletions(java.util.Collection<DeleteFleetErrorItem> unsuccessfulFleetDeletions) {
          if (unsuccessfulFleetDeletions == null) {
              this.unsuccessfulFleetDeletions = null;
              return;
          }
  
          this.unsuccessfulFleetDeletions = new com.amazonaws.internal.SdkInternalList<DeleteFleetErrorItem>(unsuccessfulFleetDeletions);
      }
docs: <p>
  Information about the EC2 Fleets that are not successfully deleted.
  </p>
  
  @param unsuccessfulFleetDeletions
  Information about the EC2 Fleets that are not successfully deleted.