class PipeLineSessionBase extends HashMap<String,Object> implements IPipeLineSession {

	public String get(String key, String defaultValue) {
		String ob = this.getString(key);
	
		if (ob == null) return defaultValue;
		return ob;
	}

	public  PipeLineSessionBase();
	public  PipeLineSessionBase(int initialCapacity);
	public  PipeLineSessionBase(int initialCapacity, float loadFactor);
	public  PipeLineSessionBase(Map<String, Object> t);

}