function mustCallimport { mustCall } from "https://deno.land/std@0.119.0/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]