src/java.desktop/share/classes/javax/imageio/spi/DigraphNode.java

*** 41,65 ****
--- 41,68 ----
   */
  class DigraphNode<E> implements Cloneable, Serializable {
      private static final long serialVersionUID = 5308261378582246841L;
  
      /** The data associated with this node. */
+     @SuppressWarnings("serial") // Not statically typed as Serializable
      protected E data;
  
      /**
       * A {@code Set} of neighboring nodes pointed to by this
       * node.
       */
+     @SuppressWarnings("serial") // Not statically typed as Serializable
      protected Set<DigraphNode<E>> outNodes = new HashSet<>();
  
      /** The in-degree of the node. */
      protected int inDegree = 0;
  
      /**
       * A {@code Set} of neighboring nodes that point to this
       * node.
       */
+     @SuppressWarnings("serial") // Not statically typed as Serializable
      private Set<DigraphNode<E>> inNodes = new HashSet<>();
  
      public DigraphNode(E data) {
          this.data = data;
      }