src/vs/workbench/api/browser/mainThreadLanguageFeatures.ts/MainThreadLanguageFeatures/_reviveIndentationRule
class MainThreadLanguageFeatures:	private static _reviveIndentationRule(indentationRule: IIndentationRuleDto): IndentationRule {
		return {
			decreaseIndentPattern: MainThreadLanguageFeatures._reviveRegExp(indentationRule.decreaseIndentPattern),
			increaseIndentPattern: MainThreadLanguageFeatures._reviveRegExp(indentationRule.increaseIndentPattern),
			indentNextLinePattern: indentationRule.indentNextLinePattern ? MainThreadLanguageFeatures._reviveRegExp(indentationRule.indentNextLinePattern) : undefined,
			unIndentedLinePattern: indentationRule.unIndentedLinePattern ? MainThreadLanguageFeatures._reviveRegExp(indentationRule.unIndentedLinePattern) : undefined,
		};
	}