Description:
------------
Method who's parameter is object of particular interface should not invoke other method of its interface. 

Reproduce code:
---------------
interface Printable{
 public function print();
}

interface Writeable{
 public function write($text);
}

class ImplClass implements Printable, Writeable{
 public function print(){
  return 'hallo'
 }
 public function write($text){
  //...
  echo 'written';
 }
}

class Printer {
 public static function printIt(Printable p){
  p->write('wow');
 }
}

$a = new ImplClass();
Printer::printIt($a);

// the result is 'written'

Expected result:
----------------
error: Printable object doesn't have 'write' method 

Actual result:
--------------
written