function mustCallimport { mustCall } from "https://deno.land/std@0.155.0/node/_utils.ts"; mustCall<T extends unknown[]>(fn?: (...args: T) => void,expectedExecutions?,timeout?,): [Promise<void>, (...args: T) => void]Type ParametersT extends unknown[]Parametersoptionalfn: (...args: T) => void = [UNSUPPORTED]optionalexpectedExecutions = [UNSUPPORTED]optionaltimeout = [UNSUPPORTED]Returns[Promise<void>, (...args: T) => void]