method GenericConsensusEngineId.prototype.extractAuthorimport { GenericConsensusEngineId } from "https://deno.land/x/polkadot@0.2.11/types/mod.ts"; extractAuthor(bytes: Bytes, sessionValidators: AccountId[]): AccountId | undefinedParametersbytes: BytessessionValidators: AccountId[]ReturnsAccountId | undefined