[JASS] what is bool afterunits?

[Cheshire]

in this native function:

native CreateFogModifierRect        takes player forWhichPlayer, fogstate whichState, rect where, boolean useSharedVision, boolean afterUnits returns fogmodifier

what is boolean afterUnits checking?

thanks!

 

[Gismo359]

From jassdoc:

Will determine whether or not units in that area will be masked by the fog. If it is set to true and the fogstate is masked, it will hide all the units in the fog modifier's radius and mask the area. If set to false, it will only mask the areas that are not visible to the units.