protected void handleKeyValue(String key, String value) {
        map.put(key, parseValue(value));
    }
Parses a map on the form <code>{key1:value1,key2:value2 ...}</code>

@param string the textual representation of the map
@param map the map to which the values will be added
@return the input map instance for convenience
vespajlib/src/main/java/com/yahoo/text/MapParser.java