@Override
    protected Message processRequest0(final CliRequestContext ctx, final GetLeaderRequest request,
                                      final RpcRequestClosure done) {
        // ignore
        return null;
    }
Process get leader request.

@author boyan (boyan@alibaba-inc.com)
@author jiachun.fjc
jraft-core/src/main/java/com/alipay/sofa/jraft/rpc/impl/cli/GetLeaderRequestProcessor.java