"Goto defintion" option for BP nodes does nothing

Development Programming & Scripting Blueprint
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This is a reply to OP’s original question on reddit since it’s been archived: https://www.reddit.com/r/unrealengine/comments/9gkjh7/how_do_i_look_up_c_function_equivalents_of/

How do I look up C++ function equivalents of Blueprint nodes?

The quickest way I’ve found is to copy the Blueprint node and paste it into a text editor.

For example here’s a node I copied:

Begin Object Class=/Script/BlueprintGraph.K2Node_CallFunction Name="K2Node_CallFunction_11" ExportPath="/Script/BlueprintGraph.K2Node_CallFunction'/IslandGenerator/Spawner/BP_Spawner.BP_Spawner:EventGraph.K2Node_CallFunction_11'"
   bIsPureFunc=True
   FunctionReference=(MemberParent="/Script/CoreUObject.Class'/Script/NavigationSystem.NavigationSystemV1'",MemberName="GetNavigationSystem")
 ....
End Object

I omitted some of the output, but what you’re looking for is the line starting with “FunctionReference” which will point you to the C++ class and method in this case NavigationSystemV1::GetNavigationSystem.