add_setters

Adds multiple setters to this.

See [method@Breakpoint.add_setter].

Example:

```c adw_breakpoint_add_setters (breakpoint, G_OBJECT (box), "orientation", GTK_ORIENTATION_VERTICAL, G_OBJECT (button), "halign", GTK_ALIGN_FILL, G_OBJECT (button), "valign", GTK_ALIGN_END, NULL); ```

Parameters:

this	a breakpoint
first_object	the first target object
...	the value of the first setter, followed by a list of object, property and value triplets, terminated by `NULL`
first_property	the first target property