A DESCRIPTION OF THE PROBLEM :
When comparing a JavaFX BitSet with null a NullPointerException is thrown. Because the null check was removed.
This is especially problematic when checking if a list with null values contains a BitSet.

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Create a BitSet and call BitSet.equals(null).

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
I would expect Bitset.equals to return false.
ACTUAL -
A NullPointerException is thrown.