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    kodo.util.UnsupportedOptionException: Unable to create second class object proxy for type: "class be.li3.util.history.LongHist".
        at kodo.util.ProxyManagerImpl.newMapProxy(ProxyManagerImpl.java:211)
        at kodo.runtime.StateManagerImpl.newFieldProxy(StateManagerImpl.java:1569)
        at kodo.runtime.SingleFieldManager.proxy(SingleFieldManager.java:242)
        at kodo.runtime.StateManagerImpl.proxyFields(StateManagerImpl.java:3097)
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