Action "integer range" composite binding?

Is it possible to create a binding similar to the 1D axis and 2D vector composites, but where each binding is mapped to a specific integer?

My use case is an inventory system, where keyboard keys 1, 2, 3, 4, and TAB each select a different inventory group.

Preferred mapping would then be:
1 = 0,
2 = 1,
3 = 2,
4 = 3,
TAB = 4

Edit: By mapping I mean number returned by ReadValue<Int>

 

The answer was to create a custom composite. Albeit clunky it works

Code (CSharp):

1. using UnityEngine.InputSystem.Utilities;
2. using UnityEngine.InputSystem.Layouts;
3. using UnityEngine.InputSystem;
4. using UnityEngine;
5. using UnityEditor;
6.  
7. #if UNITY_EDITOR
8. [InitializeOnLoad] // Automatically register in editor.
9. #endif
10.  
11. [DisplayStringFormat("{firstPart}+{secondPart}")]
12. public class IndexedComposite : InputBindingComposite<int>
13. {
14.     [InputControl(layout = "Button")] public int id_1;
15.     [InputControl(layout = "Button")] public int id_2;
16.     [InputControl(layout = "Button")] public int id_3;
17.     [InputControl(layout = "Button")] public int id_4;
18.     [InputControl(layout = "Button")] public int id_5;
19.  
20.     public override int ReadValue(ref InputBindingCompositeContext context)
21.     {
22.         var a = context.ReadValueAsButton(id_1);
23.         var b = context.ReadValueAsButton(id_2);
24.         var c = context.ReadValueAsButton(id_3);
25.         var d = context.ReadValueAsButton(id_4);
26.         var e = context.ReadValueAsButton(id_5);
27.  
28.         if (a) return 1;
29.         if (b) return 2;
30.         if (c) return 3;
31.         if (d) return 4;
32.         if (e) return 5;
33.         return 0;
34.     }
35.  
36.     static IndexedComposite()
37.     {
38.         InputSystem.RegisterBindingComposite<IndexedComposite>();
39.     }
40.  
41.     [RuntimeInitializeOnLoadMethod]
42.     static void Init() { } // Trigger static constructor.
43. }