seq_contains uses String representation for Java Objects

Hey everyone,

I am using Freemarker for my Java application, that's why I find myself 
often processing whole Java
objects which eases the template creation.

Now I have noticed the following, when invoking `seq_contains` on a list 
of Java Objects and not on,
for instance Strings or numbers, I receive true when both Objects have 
the same String representation,
even though they are actually different Objects due to `hash()`, 
`equals()` or `compareTo()`.

For now I have extended my `toString()` method to contain more 
information, which seems to be better,
but is there another solution to my problem?

Best Konrad

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