The observer base type is one of two base types (the other being nobserver)
for objects whose primary purpose to derive outputs from layers (directly or
via other observers) outside of the “natural” computation of that object.
observer
is the polling type used for model responses, whereas nobserver
is triggered by modification events.
some_obs description
The description of some_obs
will include the additional Stalkee
element.
some_obs target stalkee
Set the observed object of some_obs
to be stalkee
.
some_obs report
Print the derived string state of the observed object.