if (!e.affectsConfiguration('editor')) {
  return;
}

const customizedLanguageConfigKeys = {
	brackets: 'editor.language.brackets',
	colorizedBracketPairs: 'editor.language.colorizedBracketPairs'
};

// ...

const languageConfigKeys = new Set(Object.values(customizedLanguageConfigKeys));

const globalConfigChanged = e.change.keys.some((k) =>
				languageConfigKeys.has(k)
			);
const localConfigChanged = e.change.overrides
    .filter(([overrideLangName, keys]) =>
        keys.some((k) => languageConfigKeys.has(k))
    )
    .map(([overrideLangName]) => this.modeService.getLanguageIdentifier(overrideLangName));

if (globalConfigChanged) {
    this.configurations.clear();
    this.onDidChangeEmitter.fire(new LanguageConfigurationServiceChangeEvent(undefined));
} else {
    for (const languageIdentifier of localConfigChanged) {
        if (languageIdentifier) {
            this.configurations.delete(languageIdentifier.id);
            this.onDidChangeEmitter.fire(new LanguageConfigurationServiceChangeEvent(languageIdentifier));
        }
    }
}