public long maxExportLength() {
            return this.getMacLength() * 255L;
        }
Returns the maximum export length that can be supported with this KDF.

@see <a href="https://www.rfc-editor.org/rfc/rfc9180.html#name-secret-export">secret
        export</a>
common/src/main/java/org/conscrypt/HpkeSuite.java