src/vs/workbench/api/common/extHostLanguageFeatures.ts/ExtHostLanguageFeatures/$setWordDefinitions
class ExtHostLanguageFeatures:	$setWordDefinitions(wordDefinitions: extHostProtocol.ILanguageWordDefinitionDto[]): void {
		for (const wordDefinition of wordDefinitions) {
			this._documents.setWordDefinitionFor(wordDefinition.languageId, new RegExp(wordDefinition.regexSource, wordDefinition.regexFlags));
		}
	}