make POILogFactory _loggers cache final
git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1761660 13f79535-47bb-0310-9956-ffa450edef68
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@ -35,7 +35,7 @@ public final class POILogFactory {
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/**
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/**
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* Map of POILogger instances, with classes as keys
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* Map of POILogger instances, with classes as keys
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*/
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*/
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private static Map<String,POILogger> _loggers = new HashMap<String,POILogger>();
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private static final Map<String,POILogger> _loggers = new HashMap<String,POILogger>();
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/**
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/**
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* A common instance of NullLogger, as it does nothing
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* A common instance of NullLogger, as it does nothing
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