public void Uncollapse(CollapsedLineSection section)
{
int sectionLength = section.End.LineNumber - section.Start.LineNumber + 1;
AddRemoveCollapsedSection(section, sectionLength, false);
// do not call CheckProperties() in here - Uncollapse is also called during line removals
}
internal void AddCollapsedSection(CollapsedLineSection section, int sectionLength)
{
AddRemoveCollapsedSection(section, sectionLength, true);
}