diff --git a/src/utils/SettingMapper.ts b/src/utils/SettingMapper.ts
index 4ac3663..c2aa49f 100644
--- a/src/utils/SettingMapper.ts
+++ b/src/utils/SettingMapper.ts
@@ -46,7 +46,11 @@ export default class SettingMapper {
 
 	public static is(key: SettingKey | string, args?: { [key: string]: any }): boolean {
 		const value = this.getValueRef(key, args).value;
-		return !value && value === 'true';
+		return !!value && value === 'true';
+	}
+
+	public static not(key: SettingKey | string, args?: { [key: string]: any }): boolean {
+		return !this.is(key, args);
 	}
 
 	public static getValue(key: SettingKey | string, args?: { [key: string]: any }): string | undefined {