method Keyring.prototype.addFromJsonimport { Keyring } from "https://deno.land/x/polkadot@0.2.11/keyring/keyring.ts"; addFromJson(json: KeyringPair$Json, ignoreChecksum?: boolean): KeyringPairParametersjson: KeyringPair$JsonoptionalignoreChecksum: booleanReturnsKeyringPair