code: public DescribeVpcsResult withVpcs(Vpc... vpcs) {
          if (this.vpcs == null) {
              setVpcs(new com.amazonaws.internal.SdkInternalList<Vpc>(vpcs.length));
          }
          for (Vpc ele : vpcs) {
              this.vpcs.add(ele);
          }
          return this;
      }
docs: <p>
  Information about one or more VPCs.
  </p>
  <p>
  <b>NOTE:</b> This method appends the values to the existing list (if any). Use
  {@link #setVpcs(java.util.Collection)} or {@link #withVpcs(java.util.Collection)} if you want to override the
  existing values.
  </p>
  
  @param vpcs
  Information about one or more VPCs.
  @return Returns a reference to this object so that method calls can be chained together.