Extending Types * 2

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OvineByDesign
 #1
Sorry to hijack this thread but Im wondering using the above code - how do you reference the Extended type (tstudent) to be used with an function outside the type. 

Type TStudent
	Field age%

	Method GetAge%()
		Return age
	End Method
End Type

Type TStudentMusician Extends TStudent
End Type

Type ITStudent Extends TStudent
End Type

'
'How can you reference the age field using a function ?
'
Local student1:TStudentMusician = New  TStudentMusician
Local student2:ITStudent = New  ITStudent

student1.age = 23
student1.age = 28

DebugLog( ShowAge(student1))
DebugLog( ShowAge(student2))

Function ShowAge:Int( studentdata:Object )  ' <<< how to pass 

    Return Studentdata.age

End Function


NO sooner I post then I find the answer


    Return Tstudent(Studentdata).age