method FlattenedEncrypt.prototype.setUnprotectedHeaderimport { FlattenedEncrypt } from "https://dotland.deno.dev/x/jose@v5.2.4/index.ts"; setUnprotectedHeader(unprotectedHeader: JWEHeaderParameters)Sets the JWE Per-Recipient Unprotected Header on the FlattenedEncrypt object. ParametersunprotectedHeader: JWEHeaderParametersJWE Per-Recipient Unprotected Header.