Sets a new value to the [property@SpaceDrawer:matrix] property, as a [struct@GLib.Variant].
If @matrix is %NULL, then an empty array is set.
If @matrix is floating, it is consumed.
The [method@SpaceDrawer.set_types_for_locations] function may be more convenient to use.
the new matrix value, or %NULL.
See Implementation
Sets a new value to the [property@SpaceDrawer:matrix] property, as a [struct@GLib.Variant].
If @matrix is %NULL, then an empty array is set.
If @matrix is floating, it is consumed.
The [method@SpaceDrawer.set_types_for_locations] function may be more convenient to use.