Does anybody know how to pass a class.property to a method in the same class (by Reference)?

Have tried the following with no success:

Approach #1:
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THIS.Method( @THIS.Property1, @THIS.Property2 )

Approach #2:
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m.lcOldUDFParm = SET("UDFPARM")
SET UDFPARM BY REFERENCE
THIS.Method( THIS.Property1, THIS.Property2 )
SET UDFPARM &lcOldUDFParm

Thank you