Memory function garbage collection

I do recall having in an earlier installtion (before I switched PC and reinstalled Knime) a small icon activated showing the memory usage and the possibility when clicking on it it would force a garbage collection or whatever it is called. Can't find that function anymore (probably not looking correctly?). Anyone knows/can help?

It's called "Show heap status":

Table Creator

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Heap status - of course.... doh.  

Thank you!