code: public DeleteFleetsRequest withFleetIds(String... fleetIds) {
          if (this.fleetIds == null) {
              setFleetIds(new com.amazonaws.internal.SdkInternalList<String>(fleetIds.length));
          }
          for (String ele : fleetIds) {
              this.fleetIds.add(ele);
          }
          return this;
      }
docs: <p>
  The IDs of the EC2 Fleets.
  </p>
  <p>
  <b>NOTE:</b> This method appends the values to the existing list (if any). Use
  {@link #setFleetIds(java.util.Collection)} or {@link #withFleetIds(java.util.Collection)} if you want to override
  the existing values.
  </p>
  
  @param fleetIds
  The IDs of the EC2 Fleets.
  @return Returns a reference to this object so that method calls can be chained together.