https://docs.godotengine.org/en/stable/tutorials/scripting/c_sharp/diagnostics/GD0302.html
GD0302: The generic type parameter must be annotated with the '[MustBeVariant]' attribute — Godot...
,,,,,, Rule ID, GD0302,, Category, Usage,, Fix is breaking or non-breaking, Breaking,, Enabled by default, Yes,,,, Cause: A generic type is specified for a...