Indicates that the row/column should be allocated just enough space to
accomidate the preferred size of all components contained completely within
this row/column.
A utility class that you can use if you want a property that
automatically registers a proximity hook to its object, when
the object is placed in a map.
Returns a map of aliases to commands, parsed
from a PropertyList containing zero or more properties
named "alias-whatever", where the value is the command
to substitute when the player types "whatever".