The parameters this instance actually SETS, of those the sheet declares. A parameter the instance leaves alone still has a value in ParamValues - the sheet's own stored one - so without this the two are indistinguishable, and a sheet nothing sets looks settled.

False on the record of the top sheet itself, which analyseUnderTop also produces so that "which sheets are in this design" can be answered - the top is an instance of nothing, and reading it as one made a top sheet's parameters look bound to their own declared values.

The value of each parameter the sheet declares, inside this instance. None marks a value that could not be evaluated - unknown, never reported as a conflict.