Appearance formatting of headers in vision tables

For Vision tables/power tables, how do you format the headers? I can see properties for the row foreground and background but nothing for the header font colour.

In the power table, use the built in configureHeaderStyle extension function, and use the ‘foreground’ property to change the font color of the header.

Example:

def configureHeaderStyle(self, colIndex, colName):
	from javax.swing import SwingConstants
	return {
		'foreground': 'white',
		'background': 'black'}