error occur in swift 4 migration

[jjjesuasir]

public func upTo(limit: Int, callback: @escaping (Void) -> Void) {
(self...limit).forEach { _ in
callback(<#Void#>)
}
}public func downTo(limit: Int, callback: (Void) -> Void) {
var selfCopy = self
while selfCopy >= limit {
callback()
selfCopy -= 1
}
}
public func times(function: @escaping (Void) -> Void) {
self.times { (index: Int) -> Void in
function(<#Void#>)
}
}
error
Missing argument for parameter #1 in call
int.swift file
Pods/Cent/Sources/Int.swift:95:22: Editor placeholder in source file