Per JEP 526: Lazy Constants, lazy constants must be stored in a final field to enable constant-folding optimizations by the JVM.

Correct usage:

  private final LazyConstant<Logger> logger = LazyConstant.of(() -> Logger.create(OrderController.class));

Incorrect usage (will be reported):

  private LazyConstant<String> x = LazyConstant.of(() -> "expensive string");

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