remember the last used SIM card on a per-number basis

app/src/main/kotlin/com/simplemobiletools/smsmessenger/extensions/Collections.kt

@@ -0,0 +1,11 @@
+package com.simplemobiletools.smsmessenger.extensions
+
+inline fun <T> List<T>.indexOfFirstOrNull(predicate: (T) -> Boolean): Int? {
+    var index = 0
+    for (item in this) {
+        if (predicate(item))
+            return index
+        index++
+    }
+    return null
+}