How to use the vscode-css-languageservice.getLESSLanguageService function in vscode-css-languageservice

return {
                        ...symbol,
                        // TODO: this could contain other things, e.g. style.myclass
                        containerName: 'style',
                    };
                }

                return symbol;
            });
    }
}

const langs = {
    css: getCSSLanguageService(),
    scss: getSCSSLanguageService(),
    less: getLESSLanguageService(),
};

function extractLanguage(document: Document): string {
    const attrs = document.getAttributes();
    return attrs.lang || attrs.type;
}

function getLanguage(kind?: string) {
    switch (kind) {
        case 'scss':
        case 'text/scss':
            return 'scss';
        case 'less':
        case 'text/less':
            return 'less';
        case 'css':

hoverProvider: true,
    documentSymbolProvider: true,
    referencesProvider: true,
    definitionProvider: true,
    documentHighlightProvider: true,
    codeActionProvider: true,
    renameProvider: true,
    colorProvider: {},
  }
  return {capabilities}
})

const languageServices: {[id: string]: LanguageService} = {
  css: getCSSLanguageService(),
  scss: getSCSSLanguageService(),
  less: getLESSLanguageService(),
  wxss: getCSSLanguageService(),
}

function getLanguageService(document: TextDocument) {
  let service = languageServices[document.languageId]
  if (!service) {
    connection.console.log(
      'Document type is ' + document.languageId + ', using css instead.'
    )
    service = languageServices['css']
  }
  return service
}

let documentSettings: Settings

referencesProvider: true,
      definitionProvider: true,
      documentHighlightProvider: true,
      codeActionProvider: true,
      renameProvider: true,
      colorProvider: {},
      foldingRangeProvider: true
    }
    return { capabilities }
  }
)

const languageServices: { [id: string]: LanguageService } = {
  css: getCSSLanguageService(),
  scss: getSCSSLanguageService(),
  less: getLESSLanguageService(),
  wxss: getCSSLanguageService()
}

function getLanguageService(document: TextDocument) {
  let service = languageServices[document.languageId]
  if (!service) {
    connection.console.log(
      'Document type is ' + document.languageId + ', using css instead.'
    )
    service = languageServices['css']
  }
  return service
}

let documentSettings: Settings

function lessParser(embeddedDoc:TextDocument, options: IAutocompleteArguments) {
    const languageService = getLESSLanguageService();
    return languageService.doComplete(embeddedDoc, options.position, languageService.parseStylesheet(embeddedDoc));
}
function scssParser(embeddedDoc:TextDocument, options: IAutocompleteArguments) {

export function getLESSMode(vueHTMLLs: VueHTMLLanguageService, documentRegions: LanguageModelCache): LanguageMode {
  const languageService = getLESSLanguageService();
  return getStyleMode('less', vueHTMLLs, languageService, documentRegions);
}

export function getLESSMode(documentRegions: LanguageModelCache): LanguageMode {
  const languageService = getLESSLanguageService();
  return getStyleMode('less', languageService, documentRegions);
}