API CollapseTrainerSkillLine

Collapses a header in the trainer window, hiding all spells below it. CollapseTrainerSkillLine(index)

Arguments

 * index : number - The index of a line in the trainer window (if the supplied index is not a header, an error is produced).
 * Index 0 ("All") will collapse all headers.
 * Note that indices are affected by the trainer filter, see and

Example
Collapses all trainer headers. This can also be done by using index 0 instead. for i = 1, GetNumTrainerServices do 	local category = select(3, GetTrainerServiceInfo(i)) if category == "header" then CollapseTrainerSkillLine(i) end end