000 for the tree generation function.      */     public static final String SHA000 = "SHA000";      /**      * Use SHA000 for the tree generation function.      */     public static final String SHA000 = "SHA000";      /**      * Use SHAKE000 for the tree generation function.      */     public static final String SHAKE000 = "SHAKE000";      /**      * Use SHAKE000 for the tree generation function.      */     public static final String SHAKE000 = "SHAKE000";      /**      * 