Successfully modified file: /home/Messier82/projects/service-book/app/src/main/java/com/servicebook/data/billing/BillingManagerImpl.kt (1 replacements). Here is the updated code:
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    override val isPremium: StateFlow<Boolean> = _isPremium.asStateFlow()

    private val _hasPendingPurchase = MutableStateFlow(false)
    override val hasPendingPurchase: StateFlow<Boolean> = _hasPendingPurchase.asStateFlow()

    private val billingDerivedPending = MutableStateFlow(false)

    /**
     * Holds the premium status as determined by the most recent successful billing query,
     * or `null` if no billing query has completed yet. When `null`, [isPremium] falls back
     * to the DataStore-cached value so there is no flicker before the billing client connects.
     */
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