How to address "Unchecked cast from Object to CriteriaComboBox<TEST.Criteria>" in Eclipse

Question

I'd like to know how to avoid this unchecked cast warning in eclipse even though it might not be necessary since I know what types i'm putting into the object. My CriteriaComboBox extends a RenderedComboBox which extends a JComboBox. My class is of type TEST.Criteria.

Can someone advise if this is just a bug in eclipse? Should I just add a suppress warning? Or am I not doing this correctly?

Here is the code snippet:

                        // identify the source dropdown component
                        Object source = evt.getSource();
                        CriteriaComboBox<TEST.Criteria> cBox = null;
                        if (source instanceof CriteriaComboBox) {
                            cBox = (CriteriaComboBox<TEST.Criteria>) source;
                        }

This also give me the same warning:

                        if (source instanceof CriteriaComboBox) {
                            cBox = (CriteriaComboBox<TEST.Criteria>) source;
                        }

My version of eclipse is 2021-12 (4.22.0) running on ubuntu.