...monothelitism is the view that Jesus Christ has two natures but only one will. - wikipedia

In the garden, Jesus prayed:

Father, if you are willing, take this cup from me; yet not my will, but yours be done. - Luke 22:42 NIV

How do (trinitarian) monothelites explain this? Do they believe that the Son's will can vary from the Father's, or that the first half of this prayer does not actually represent an expression of the Son's will?