...given that cases where "every instance of getPropertySetInfo returns a new
object [...] must not be cached" anyway, so just key on the XPropertySetInfo
instances.
Change-Id: I11f0a1fe030226d1d26d6b6e6a2654f4511fdce8
see https://gerrit.libreoffice.org/#/c/3367/
and Change-Id: I00c96fa77d04b33a6f8c8cd3490dfcd9bdc9e84a for details
Change-Id: I199a75bc4042af20817265d5ef85b1134a96ff5a