referrerpolicy=no-referrer-when-downgrade
pallet_referenda::migration::switch_block_number_provider

Function migrate_block_number_provider

Source 
pub fn migrate_block_number_provider<BlockConverter, T, I: 'static>() -> Weight
where
    BlockConverter: BlockNumberConversion<BlockNumberFor<T>, BlockNumberFor<T, I>>,
    T: Config<I>,