declare namespace org {
    namespace spongepowered {
        namespace api {
            namespace item {
                namespace potion {
                    // @ts-ignore
                    interface PotionType extends org.spongepowered.api.CatalogType {
                        // @ts-ignore
                         getEffects(): any[] /*java.util.List*/;
                    }
                }
            }
        }
    }
}
