method Init.prototype._metaFromChainimport { Init } from "https://deno.land/x/polkadot@0.2.25/api/base/Init.ts"; _metaFromChain(optMetadata?: Record<string, HexString>): Promise<[Hash, Metadata]>ParametersoptionaloptMetadata: Record<string, HexString>ReturnsPromise<[Hash, Metadata]>