function firstimport { first } from "https://dotland.deno.dev/x/proc@0.21.9/tests/deps/asynciter.ts"; first<T>(iterable: AsyncIterable<T>): Promise<T | null>Return the first item of the sequence. Type ParametersTParametersiterable: AsyncIterable<T>ReturnsPromise<T | null>The first item of the sequence. import firstimport { first } from "https://dotland.deno.dev/x/proc@0.21.9/tests/deps/asynciter.ts";