pub fn slot_duration_at<A, B, C>( client: &C, block_hash: <B as Block>::Hash, ) -> Result<SlotDuration, Error>where A: Codec, B: Block, C: ProvideRuntimeApi<B>, <C as ProvideRuntimeApi<B>>::Api: AuraApi<B, A>,
Get the slot duration for Aura by reading from a runtime API at a given block’s state.