Override of inTree rule to ensure this does not appear in the model tree.
Flags : Cached (Note this is uncached)
Expression : false
Override of treeLabel rule to be inert.
Flags : Cached (Note this is uncached)
Expression : this[R.symbols.name]
Override of update rule to do nothing.
Flags : None. (Note this is uncached)
Expression : 0
NullDesign (d.1.0)
Mixins: BaseModel
NullDesign creates null models, which exist but act like nothing. They do not appear in the children list, the model tree, or any normal use. They are almost universally used to act as placeholders when it is determined that a given node should not be created.