protected void addEntry(HashEntry<K, V> entry, int hashIndex) {
        data[hashIndex] = entry;
    }
Adds an entry into this map.
<p/>
This implementation adds the entry to the data storage table.
Subclasses could override to handle changes to the map.

@param entry     the entry to add
@param hashIndex the index into the data array to store at
jphp-runtime/src/php/runtime/common/collections/map/AbstractHashedMap.java