src/Forms/HTMLEditor/TinyMCEConfig.php
protected function getEditorCSS()
    {
        $editor = [];
        $resourceLoader = ModuleResourceLoader::singleton();
        foreach ($this->getContentCSS() as $contentCSS) {
            $editor[] = $resourceLoader->resolveURL($contentCSS);
        }
        return $editor;
    }
protected function getEditorCSS()
    {
        $editor = [];
        $resourceLoader = ModuleResourceLoader::singleton();
        foreach ($this->getContentCSS() as $contentCSS) {
            $editor[] = $resourceLoader->resolveURL($contentCSS);
        }
        return $editor;
    }
protected function getEditorCSS ( ) { $ editor = [ ] ; $ resourceLoader = ModuleResourceLoader :: singleton ( ) ; foreach ( $ this -> getContentCSS ( ) as $ contentCSS ) { $ editor [ ] = $ resourceLoader -> resolveURL ( $ contentCSS ) ; } return $ editor ; }
Get location of all editor.css files.
All resource specifiers are resolved to urls.

@return array
Get location of all editor . css files . All resource specifiers are resolved to urls .