1.1 --- a/imiptools/handlers/scheduling/freebusy.py	Mon Feb 08 00:14:53 2016 +0100
     1.2 +++ b/imiptools/handlers/scheduling/freebusy.py	Mon Feb 08 00:47:00 2016 +0100
     1.3 @@ -217,6 +217,11 @@
     1.4      "schedule_next_available_in_freebusy" : schedule_next_available_in_freebusy,
     1.5      }
     1.6  
     1.7 +# Registries of locking and unlocking functions.
     1.8 +
     1.9 +locking_functions = {}
    1.10 +unlocking_functions = {}
    1.11 +
    1.12  # Registries of listener functions.
    1.13  
    1.14  confirmation_functions = {}