let sectionSetRange = currSec.count...(currSec.count + newSec.count)
let indexSet = IndexSet(integersIn: sectionSetRange)
var indexPaths = [IndexPath]()
for index in 0..<sectionSetRange.count {
    for item in 0..<arrFiles[index].documents.count {
        indexPaths.append(IndexPath(item: item, section: index))
    }
}