public function get($key, $default = null) {
		$this->check();
		$value = $this->readValue($key);
		return is_null($value) ? $default : $value;
	}
public function get($key, $default = null) {
		$this->check();
		$value = $this->readValue($key);
		return is_null($value) ? $default : $value;
	}
public function get ( $ key , $ default = null ) { $ this -> check ( ) ; $ value = $ this -> readValue ( $ key ) ; return is_null ( $ value ) ? $ default : $ value ; }
Get value from storage
@param string $key
@return mixed
Get value from storage