function &addConditional($condition, $hidden = true, &$offset = null) {
	#php5e
		return $this->addChild(new $this->childClass_Conditional($this, $condition, $hidden), $offset);
	}
function &addConditional($condition, $hidden = true, &$offset = null) {
	#php5e
		return $this->addChild(new $this->childClass_Conditional($this, $condition, $hidden), $offset);
	}
#php5