code: public DescribeFleetsResult withFleets(Fleet... fleets) {
          if (this.fleets == null) {
              setFleets(new java.util.ArrayList<Fleet>(fleets.length));
          }
          for (Fleet ele : fleets) {
              this.fleets.add(ele);
          }
          return this;
      }
docs: <p>
  Information about the fleets.
  </p>
  <p>
  <b>NOTE:</b> This method appends the values to the existing list (if any). Use
  {@link #setFleets(java.util.Collection)} or {@link #withFleets(java.util.Collection)} if you want to override the
  existing values.
  </p>
  
  @param fleets
  Information about the fleets.
  @return Returns a reference to this object so that method calls can be chained together.