Inserted keyframes in material node graph don't show up in graph editor or anywhere else

Description

I've been trying to animate some material properties from the node graph, and while I can add keyframes to node fields (like animating opacity), they simply don't show up in the graph editor or dope sheet like they would for Cycles and so forth.

Unfortunately, this also forces the default (non-linear) interpolation between those keyframes.

System Information

Windows 10 Pro with GTX 970 GPU

Software Version

• Blender version: 2.79b
• LuxCore version: 2.1alpha0

Related:

• https://blender.stackexchange.com/questions/94329/how-do-i-view-animation-from-an-animation-nodes-node-tree
• https://github.com/JacquesLucke/animation_nodes/issues/820
• https://github.com/JacquesLucke/animation_nodes/issues/359 (this one contains an interesting quote from a Blender developer)

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Reproduce the issue with Blender 2.79b and LuxCore 2.1alpha0 by inserting keyframes on material node fields, then compare their visibility and interpolation controls with Cycles. Done means the inserted material keyframes appear in the graph editor or dope sheet and their interpolation can be adjusted.