accelerator_valid

function accelerator_valid(keyval:Number, modifiers:Gdk.ModifierType):Boolean {
    // Gjs wrapper for gtk_accelerator_valid()
}

Determines whether a given keyval and modifier mask constitute a valid keyboard accelerator. For example, the #GDK_KEY_a keyval plus #GDK_CONTROL_MASK is valid - this is a "Ctrl+a" accelerator. But, you can't, for instance, use the #GDK_KEY_Control_L keyval as an accelerator.