Please help solve error LNK2019

I’m trying to write custom K2 node. But the project cannot build showing an error:

I know that LNK errors are usually solved by connecting the right module to Build.cs. All other LNK errors turned out to be solved in this way. It is strange that the compiler only indicates a problem with this function of the UK2Node class.
Here are my modules:

299578-2.png

P.S: Now I’m trying to create a copy of the GetArrayItem node to change the part of the code and get the custom node I need. Therefore, the entire code of my class is a copy of the class K2Node_GetArrayItem