Sets @self to be the union of @self and @other.
That is, add all values from @other into @self that weren't part of it.
It is allowed for @self and @other to be the same bitset. Nothing will happen in that case.
the GtkBitset to union with
See Implementation
Sets @self to be the union of @self and @other.
That is, add all values from @other into @self that weren't part of it.
It is allowed for @self and @other to be the same bitset. Nothing will happen in that case.