Build stubs for modifiers

idea/testData/decompiler/decompiledText/Modifiers/Modifiers.kt

@@ -1,3 +1,12 @@
 package test
 
-data class Modifiers
+data class Modifiers(val x: Int) {
+    tailrec fun sum(x: Long, sum: Long): Long {
+        if (x == 0.toLong()) return sum
+        return sum(x - 1, sum + x)
+    }
+
+    inline fun inlined(crossinline arg1: ()->Unit, noinline arg2: ()->Unit): Unit {}
+}
+
+annotation class Ann