294          * This routine performs lazy instantiation of the operator symbols supported by this helper.

   294          * This routine performs lazy instantiation of the operator symbols supported by this helper.

   295          * After initialization is done, the suppliers are cleared, to free up memory.

   295          * After initialization is done, the suppliers are cleared, to free up memory.

   296          */

   296          */

   297         private OperatorSymbol[] initOperators() {

   297         private OperatorSymbol[] initOperators() {

   298             OperatorSymbol[] operators = operatorSuppliers.stream()

   298             OperatorSymbol[] operators = operatorSuppliers.stream()

   300                     .toArray(OperatorSymbol[]::new);

   300                     .toArray(OperatorSymbol[]::new);

   301             alternatives = Optional.of(operators);

   301             alternatives = Optional.of(operators);

   302             operatorSuppliers = null; //let GC do its work

   302             operatorSuppliers = null; //let GC do its work

   303             return operators;

   303             return operators;

   304         }

   304         }