I need prevent cache for file editor.css when he added to content_css

Any ideas?

@LeftandMain.php line 224

if($theme) $cssFiles[] = THEMES_DIR . "/{$theme}/css/editor.css";
else if(project()) $cssFiles[] = project() . '/css/editor.css';

// Remove files that don't exist
foreach($cssFiles as $k => $cssFile) {
if(!file_exists(BASE_PATH . '/' . $cssFile)) unset($cssFiles[$k]);
}
$htmlEditorConfig->setOption('content_css', implode(',', $cssFiles));