this class is implementation detail of the XMSS / XMSS^MT engine, which has
moved to org.bouncycastle.crypto.signers.xmss and is package-private there. Drive XMSS
through XMSSSigner /
XMSSKeyPairGenerator and the
org.bouncycastle.crypto.params key classes instead; the engine operations those are
built on are on org.bouncycastle.crypto.signers.xmss.XMSSEngine.
XMSSSigner/XMSSKeyPairGeneratorand the org.bouncycastle.crypto.params key classes instead; the engine operations those are built on are on org.bouncycastle.crypto.signers.xmss.XMSSEngine.