public function add_inc($name, $obj){
		if ( !isset($this->inc->{$name}) ){
			$this->inc->{$name} = $obj;
		}
	}
public function add_inc($name, $obj){
		if ( !isset($this->inc->{$name}) ){
			$this->inc->{$name} = $obj;
		}
	}
public function add_inc ( $ name , $ obj ) { if ( ! isset ( $ this -> inc -> { $ name } ) ) { $ this -> inc -> { $ name } = $ obj ; } }
Adds a property to the MVC object inc if it has not been declared.

@return bool
Adds a property to the MVC object inc if it has not been declared .