How to reproduce:
1. Create a new Unity project
2. Import the packages "Input System" (version 1.0.0-preview.3) and "ARKit XR Plugin" (version 3.0.0-preview.3)
3. Observe the error in the Console window

Expected result: "XRUtilities" contains a definition for "kXRInterfaceMatchAnyVersion"
Actual result: an error about the missing definition for "kXRInterfaceMatchAnyVersion" is thrown (see attached screenshot)

Reproducible with: 2019.2.14f1 (ARKit XR Plugin version 3.0.0-preview.3), 2019.3.0f1 (ARKit XR Plugin version 3.0.0-preview.3), 2020.1.0a14 (ARKit XR Plugin version 3.0.0-preview.3)
Could not test with: 2018.4.13f1

Notes:
1. In the affected Script (InputLayoutLoader.cs) in line 33, changing "kXRInterfaceMatchAnyVersion" to "InterfaceMatchAnyVersion" removes the error from the Console
2. I could not test with Unity 2018.4.13f1 due to the needed package version being unavailable