A collective object is usually given the same plural vocabulary as its individuals. When we use that plural vocabulary, we will filter for or against the collective, as determined by the noun phrase production, when the player uses the collective term.
This is a mix-in class, intended to be used along with other (usually Thing-derived) superclasses.
Collective : object
In order to be a collective for some objects, an object must have vocubulary for the plural name, and must return true from this method for the collected objects.