function writeVarnumimport { writeVarnum } from "https://dotland.deno.dev/std@0.116.0/encoding/binary.ts"; writeVarnum(w: Deno.Writer,x: number,o?: VarnumOptions,): Promise<number>Encodes and writes x to w. Resolves to the number of bytes written. Encodes and writes x to w. Resolves to the number of bytes written. o.dataType defaults to "int32". Parametersw: Deno.Writerx: numberoptionalo: VarnumOptions = [UNSUPPORTED]ReturnsPromise<number>