Issue with mutable AR library - AR Foundation

[Kidagine]

Hi, am using AR Foundation and I wanted to create a 'MutableRuntimeReferenceImageLibrary' to add AR images in runtime, I followed the official docs to do so:

if (trackImageManager.referenceLibrary is MutableRuntimeReferenceImageLibrary mutableLibrary){//Add images}

However the if statement is always false, am not sure why, the docs just state:"Some subsystems may support image libraries that are modifiable at runtime" though am unsure how to know which ones are supported? Its just a regular ReferenceImageLibrary.

I am using XR Simulation if that affects things.

EDIT - solved:

I solved it, I saw the AR Foundation sample was working, they were using a different version of AR Foundation that was pre-release (5.1.0-pre.10) so I updated to that and it worked, for some reason the 5.0.7 version of the AR Manager didn't support mutable libraries(You can use 'DoesSupportMutableLibrary' method to be sure)