What does 2 Chronicles 18:23 mean?

Then Zedekiah, son of Chenaanah, stepped up and slapped Micaiah across the face. He said, 'So, you think God’s Spirit left me and went to you instead?' 2 Chronicles 18:23 - Modern Text Bible

(Zedekiah, one of the court prophets, reacts violently to Micaiah’s prophecy, mocking the idea that God would speak through Micaiah instead of himself.)