public int getBlockSize() {
        return blockSize;
    }
Mirrors the <a
href="https://javadoc.io/static/org.bouncycastle/bcprov-jdk15on/1.68/org/bouncycastle/jcajce/spec/ScryptKeySpec.html">class
of the same name</a> from BouncyCastle.
common/src/main/java/org/conscrypt/ScryptKeySpec.java