http://www.bouncycastle.org/java.html: The Bouncy Castle Crypto package is a Java implementation of cryptographic algorithms. This jar contains JCE provider and lightweight API for the Bouncy Castle Cryptography APIs for JDK 1.5 to JDK 1.8.
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package org.bouncycastle.pqc.crypto.gmss;

import org.bouncycastle.crypto.params.AsymmetricKeyParameter;

public class GMSSKeyParameters
    extends AsymmetricKeyParameter
{
    private GMSSParameters params;

    public GMSSKeyParameters(
        boolean isPrivate,
        GMSSParameters params)
    {
        super(isPrivate);
        this.params = params;
    }

    public GMSSParameters getParameters()
    {
        return params;
    }
}