Decided to go a different way with this.  Removed all those methods that were accessing the associated Cell object and instead we're passing the Cell object to the mouseAdapter.
Moved the code to calculate potential entities for a Cell to the Cell class.
Moved the code to calculate potential entities for a Cell to the Cell class.
Changed method signatures to include a Cell object.
Changed method signatures to include a Cell object and started referencing the Cell directly.
Changed method signatures to include a Cell object and started referencing the Cell directly.
Changed method signatures to include a Cell object.
Changed tests to reflect changes to class under test.