public void ifInitialized(Consumer<T> consumer) {
        if (initialized) {
            consumer.accept(get());
        }
    }
Execute a method on the object returned from the supplier if the object was already created.
Skips execution if the underlying object was never created.

@param consumer A consumer for the object returned by this supplier.
core/src/main/java/org/jdbi/v3/core/internal/MemoizingSupplier.java