oldContent = $old_content; return $this; } public function getOldContent() { return $this->oldContent; } public function setNewContent($new_content) { $this->newContent = $new_content; return $this; } public function getNewContent() { return $this->newContent; } public function addOldClass($class) { $this->oldClasses[] = $class; return $this; } public function getOldClasses() { return $this->oldClasses; } public function addNewClass($class) { $this->newClasses[] = $class; return $this; } public function getNewClasses() { return $this->newClasses; } }