Anyone know the method to alter city-state influence?

[Machiavelli24]

I seem to remember seeing a set and get method for city-state influence in the past but I can't seem to find it again. Anyone know what the command is or is my memory mistaken?

 

[Gedemon]

player:ChangeMinorCivFriendshipWithMajor( value ) and player:GetMinorCivFriendshipWithMajor()