function typesKnown.getUpgradeVersionimport { typesKnown } from "https://dotland.deno.dev/x/polkadot@0.2.23/mod.ts"; const { getUpgradeVersion } = typesKnown; getUpgradeVersion(genesisHash: Hash, blockNumber: BN): [ChainUpgradeVersion | undefined, ChainUpgradeVersion | undefined]ParametersgenesisHash: HashblockNumber: BNReturns[ChainUpgradeVersion | undefined, ChainUpgradeVersion | undefined]