Hi all,

I have Two classes : class "A" and class "B".
There is a Composition relationship between them. Class "A" is the whole and class "B" 
is part of A.
Which one of the following is true?

1- An instance of class "A" contains an instance of class "B" by reference.
2- An instance of class "A" contains an instance of class "B" by value.

regards
Bin/
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