code: public ListFleetsResult withFleetDetails(Fleet... fleetDetails) {
          if (this.fleetDetails == null) {
              setFleetDetails(new java.util.ArrayList<Fleet>(fleetDetails.length));
          }
          for (Fleet ele : fleetDetails) {
              this.fleetDetails.add(ele);
          }
          return this;
      }
docs: <p>
  A list of fleet details meeting the request criteria.
  </p>
  <p>
  <b>NOTE:</b> This method appends the values to the existing list (if any). Use
  {@link #setFleetDetails(java.util.Collection)} or {@link #withFleetDetails(java.util.Collection)} if you want to
  override the existing values.
  </p>
  
  @param fleetDetails
  A list of fleet details meeting the request criteria.
  @return Returns a reference to this object so that method calls can be chained together.