method LazyAsync.prototype.filterimport { LazyAsync } from "https://deno.land/x/better_iterators@v1.2.1/mod.ts"; filter<S extends T>(f: (t: T) => t is S): LazyAsync<S>Overload to support type narrowing. filter(f: Filter<T>): LazyAsync<T>Keeps only items for which f is true. Overload to support type narrowing. Type ParametersS extends TParametersf: (t: T) => t is SReturnsLazyAsync<S>Keeps only items for which f is true. Parametersf: Filter<T>ReturnsLazyAsync<T>