Fallback with dynamic binding based on other mapping

[BlayTheNinth]

keyCompressOne = Kuma.createKeyMapping(new ResourceLocation(CraftingTweaks.MOD_ID, "compress_one"))
        .withDefault(InputBinding.key(InputConstants.KEY_K, KeyModifiers.of(KeyModifier.CONTROL)))
        .withContext(KeyConflictContext.SCREEN)
        .build();

keyCompressStack = Kuma.createKeyMapping(new ResourceLocation(CraftingTweaks.MOD_ID, "compress_stack"))
        .withDefault(InputBinding.key(InputConstants.KEY_K))
        .withContext(KeyConflictContext.SCREEN)
        .build();

keyCompressAll = Kuma.createKeyMapping(new ResourceLocation(CraftingTweaks.MOD_ID, "compress_all"))
        .withDefault(InputBinding.key(InputConstants.KEY_K, KeyModifiers.of(KeyModifier.SHIFT)))
        .withContext(KeyConflictContext.SCREEN)
        .build();

In this case, I would want compress_one and compress_all to fallback to the mapping from compress_stack + their respective modifiers if they have to be virtual. Otherwise, on Fabric this would currently result in compress_stack being configurable but the others being stuck on K, which would be confusing.

Maybe something like

.withVirtualFallback(() -> keyCompressStack.getBinding().withModifiers(KeyModifiers.of(KeyModifier.SHIFT)))