/super-csv/src/main/java/org/supercsv/util/TwoDHashMap.java
innerMap = new java.util.HashMap<K2, V>(); map.put(firstKey, innerMap);
if ( innerMap == null ) { innerMap = new HashMap<K2, V> ( ) ; map.put ( firstKey, innerMap ) ; }
return null; } return innerMap.get(secondKey); } public Object set(final K1 firstKey, final K2 secondKey, final V value) { HashMap<K2, V> innerMap = map.get(firstKey); <extra_id_0> return innerMap.put(secondKey, value); } public int size() { return map.size(); } public int size(final K1 firstKey) {