code: public DescribeVirtualInterfacesResult withVirtualInterfaces(VirtualInterface... virtualInterfaces) {
          if (this.virtualInterfaces == null) {
              setVirtualInterfaces(new com.amazonaws.internal.SdkInternalList<VirtualInterface>(virtualInterfaces.length));
          }
          for (VirtualInterface ele : virtualInterfaces) {
              this.virtualInterfaces.add(ele);
          }
          return this;
      }
docs: <p>
  The virtual interfaces
  </p>
  <p>
  <b>NOTE:</b> This method appends the values to the existing list (if any). Use
  {@link #setVirtualInterfaces(java.util.Collection)} or {@link #withVirtualInterfaces(java.util.Collection)} if
  you want to override the existing values.
  </p>
  
  @param virtualInterfaces
  The virtual interfaces
  @return Returns a reference to this object so that method calls can be chained together.