If the Milestone or a component has vendors whose inventories could/should be
displayed that are relevant to it, this will return the vendor in question.
It also contains information we need to determine whether that vendor is
actually relevant at the moment, given the user's current state.
The hash code for this object. [...]
A representation of the runtime type of the object.
The hash of the vendor whose wares should be shown as associated with the
read / write
Invoked when a non-existent method or property is accessed. [...]
Returns a string representation of this object.