public Long getMagneticStoreRetentionPeriodInDays() {
        return this.magneticStoreRetentionPeriodInDays;
    }
<p>
The duration for which data must be stored in the magnetic store.
</p>

@return The duration for which data must be stored in the magnetic store.
aws-java-sdk-timestreamwrite/src/main/java/com/amazonaws/services/timestreamwrite/model/RetentionProperties.java