src/vs/editor/common/services/modelService.ts/SemanticStyling/get
class SemanticStyling:	public get(provider: DocumentTokensProvider): SemanticTokensProviderStyling {
		if (!this._caches.has(provider)) {
			this._caches.set(provider, new SemanticTokensProviderStyling(provider.getLegend(), this._themeService, this._languageService, this._logService));
		}
		return this._caches.get(provider)!;
	}