method FlattenedSign.prototype.setUnprotectedHeaderimport { FlattenedSign } from "https://dotland.deno.dev/x/jose@v5.9.2/index.ts"; setUnprotectedHeader(unprotectedHeader: JWSHeaderParameters): thisSets the JWS Unprotected Header on the FlattenedSign object. ParametersunprotectedHeader: JWSHeaderParametersJWS Unprotected Header. Returnsthis