/// Upper bounds for storage maps and double maps. Needed to prevent potential block exhaustion during deletion, etc.
/// MaxSubcategories, and MaxCategories should be reasonably small because when the category is deleted
/// all of it's subcategories with their threads and posts will be iterated over and deleted.
pub trait StorageLimits {
    /// Maximum direct subcategories in a category
    type MaxSubcategories: Get<u64>;

    /// Maximum moderator count for a single category
    type MaxModeratorsForCategory: Get<u64>;

    /// Maximum total of all existing categories
    type MaxCategories: Get<u64>;

    /// Maximum number of poll alternatives
    type MaxPollAlternativesNumber: Get<u64>;
}