https://paritytech.github.io/polkadot-sdk/master/polkadot_runtime_parachains/paras/pallet/type.FutureCodeUpgrades.html
FutureCodeUpgrades in polkadot_runtime_parachains::paras::pallet - Rust
The block number at which the planned code change is expected for a parachain.
polkadotruntimeparachainsparaspallet