Macro can have Pass-By-Reference type input

Input arguments of macros are always Pass-by-Reference.
So this is just only pin looks matter.

Pass-By-Reference modifier on Macro input was removed in 4.24. [Link Removed]

1. Create a blueprint
2. Create a function
3. Add a input argument with "+" button
4. Set Pass-by-Reference checked on this argument
5. Create a macro
6. Add a input argument with "+" button
7. The input argument on the macro entry node is displayed as Pass-by-Reference type pin

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