src/vs/editor/common/model/bracketPairsTextModelPart/bracketPairsTree/brackets.ts/LanguageAgnosticBracketTokens/didLanguageChange
class LanguageAgnosticBracketTokens:	public didLanguageChange(languageId: string): boolean {
		const existing = this.languageIdToBracketTokens.get(languageId);
		if (!existing) {
			return false;
		}
		const newRegExpStr = BracketTokens.createFromLanguage(this.getLanguageConfiguration(languageId), this.denseKeyProvider).getRegExpStr();
		return existing.getRegExpStr() !== newRegExpStr;
	}