code: public function
  	Define($Key,$Val) {
  	/*//
  	@date 2017-12-20
  	add data in storage only if it does not yet exist.
  	//*/
  
  		if(!array_key_exists($Key,$this->Storage))
  		$this->Storage[$Key] = $Val;
  
  		return $this;
  	}
docs: data storage api ////////////////////////////////////////////////////////