Checks if this and trigger2 trigger under the same conditions.
The types of one and two are `gconstpointer` only to allow use of this function with `GHashTable`. They must
each be a `GtkShortcutTrigger`.
| this |
a `GtkShortcutTrigger` |
| trigger2 |
a `GtkShortcutTrigger` |
|
true if this and |