Lockdown: Understanding "nil_lockdown_values"...?

Hi All,

I'm having a bit of trouble wrapping my head around "nil_lockdown_values" in the Lockdown plugin. I'm unfamiliar with how exactly this works. I'm assuming it is a helper method of sorts, but I see no definition. Does Rails simply have the ability to nil_ [somerandomliborclass]_values? Would someone mind unconfusing me? Also, where would I find information about general features of this nature? It seems that the API reference doesn't cover items like this -- or at least not directly.

Best!