function objectPropertyimport { objectProperty } from "https://deno.land/x/polkadot@0.2.19/util/mod.ts"; objectProperty<S>(that: object,key: string,getter: (key: string,index: number,self: S,) => unknown,getName?: (key: string, index: number) => string,index?,): voidType ParametersSParametersthat: objectkey: stringgetter: (key: string,index: number,self: S,) => unknownoptionalgetName: (key: string, index: number) => stringoptionalindex = [UNSUPPORTED]Returnsvoid