Merge commit '7621e2f8dec938cf48181c8b10afc9b01f444e68' into beta

submodules/Postbox/Sources/PostboxLogging.swift

@@ -0,0 +1,17 @@
+import Foundation
+
+private var postboxLogger: (String) -> Void = { _ in }
+private var postboxLoggerSync: () -> Void = {}
+
+public func setPostboxLogger(_ f: @escaping (String) -> Void, sync: @escaping () -> Void) {
+    postboxLogger = f
+    postboxLoggerSync = sync
+}
+
+public func postboxLog(_ what: @autoclosure () -> String) {
+    postboxLogger(what())
+}
+
+public func postboxLogSync() {
+    postboxLoggerSync()
+}