/super-csv/src/main/java/org/supercsv/util/ThreeDHashMap.java
if ( innerMap1 == null) {   return null; }
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} public int size() { return map.size(); } public int size(final K1 firstKey) { final HashMap<K2, HashMap<K3, V>> innerMap = map.get(firstKey); <extra_id_0> return 0; } return innerMap.size(); } public int size(final K1 firstKey, final K2 secondKey) { final HashMap<K2, HashMap<K3, V>> innerMap1 = map.get(firstKey);