"""HC Panel command map, generated from the @command decorators.
 
 This used to be four hand-written dicts of ``label -> bound method``, a second
 place to keep in sync with the methods themselves. Renaming a method left a
 stale entry that raised AttributeError, which SelectionDialog then swallowed --
 so the command silently did nothing.
 
 The map is now derived. The four tab_map_* methods that callers composed by
 hand are one call: every command the session, the pane and the current tab
 expose. Which tab kinds see a command is which class it is declared on; a
 command that only some instances of a class can run declares an `available`
 predicate and bind() leaves it out where that is false.
 """
 
 from . import hccommands
 
 
 class HCMaps:
     def commands(self, session, pane, tab):
         """{label: bound method} for the current session, pane and tab."""
         merged = {}
         for instance in (session, pane, tab):
             merged.update(hccommands.bind(instance))
         return dict(sorted(merged.items()))