public function testtShownPropertiesRemove()
{
//add
$p = "http://abc";
$this->_instances->addShownProperty($p);
//result of add is checked in testShownPropertiesAdd1
$rA = $this->_instances->removeShownProperty($p, false);
$this->assertNoShownProperties($this->_instances);
$this->assertTrue($rA);
//remove non existing
$rB = $this->_instances->removeShownProperty($p, false);
$this->assertFalse($rB);
}
