Method has

out/cli.cjs:6548–6552

* Check for header name existence * * @param String name Header name * @return Boolean

(name)

       * @return  Boolean
       */
      has(name) {
        name = `${name}`;
        validateName(name);
        return find(this[MAP], name) !== void 0;
      }
      /**
       * Delete all header values given name
       *