code: public List<String> getScopes(final int scopeIndex) {
      this.checkInitialized();
      return this.scopes.getOrDefault(Integer.valueOf(scopeIndex), SemanticHighlightingRegistry.UNKNOWN_SCOPES);
    }
docs: Returns with a list of TextMate scopes for the internal scope index. Returns the
  {@link SemanticHighlightingRegistry#UNKNOWN_SCOPES unknown scopes} if no scopes are registered for the argument.