chaining immutable methods vs functions

[Ola Fosheim Grøstad" <ola.fosheim.grostad+dlang at gmail.com>]

On Friday, 17 January 2014 at 01:49:24 UTC, Ola Fosheim Grøstad 
wrote:
>   pure immutable fbool and(immutable fbool b){return b.data <

Nevermind, I figured this out. immutable(fbool), not immutable 
fbool...