final protected function _isProperty(
        $propName)
    {
        // Object instance's data has the property and it evaluates to true?
        return array_key_exists($propName, $this->_objectData)
            && (bool) $this->_objectData[$propName];
    }
final protected function _isProperty(
        $propName)
    {
        // Object instance's data has the property and it evaluates to true?
        return array_key_exists($propName, $this->_objectData)
            && (bool) $this->_objectData[$propName];
    }
final protected function _isProperty ( $ propName ) { // Object instance's data has the property and it evaluates to true? return array_key_exists ( $ propName , $ this -> _objectData ) && ( bool ) $ this -> _objectData [ $ propName ] ; }
Check if an object data property exists and its value evaluates to TRUE.

@param string $propName The property name.

@return bool
Check if an object data property exists and its value evaluates to TRUE .