Add tests on smart step into lambda

idea/testData/debugger/tinyApp/src/stepping/custom/funLiteral.kt

@@ -0,0 +1,13 @@
+package funLiteral
+
+fun main(args: Array<String>) {
+    //Breakpoint!
+    f1() {
+        f2()
+    }
+}
+
+fun f1(f: () -> Unit) { f() }
+fun f2() {}
+
+// SMART_STEP_INTO_BY_INDEX: 1

idea/testData/debugger/tinyApp/src/stepping/custom/severalFunLiterals.kt

@@ -0,0 +1,25 @@
+package severalFunLiterals
+
+fun main(args: Array<String>) {
+    val myClass = MyClass()
+    //Breakpoint!
+    myClass.f1 { test() }.f2 {
+        test()
+    }
+}
+
+class MyClass {
+    fun f1(f1Param: () -> Unit): MyClass {
+        f1Param()
+        return this
+    }
+
+    fun f2(f2Param: () -> Unit): MyClass {
+        f2Param()
+        return this
+    }
+}
+
+fun test() {}
+
+// SMART_STEP_INTO_BY_INDEX: 3

idea/testData/debugger/tinyApp/src/stepping/custom/severalFunLiteralsInClass.kt

@@ -0,0 +1,28 @@
+package severalFunLiteralsInClass
+
+fun main(args: Array<String>) {
+    MyClass().inClass()
+}
+
+class MyClass {
+    fun f1(f1Param: () -> Unit): MyClass {
+        f1Param()
+        return this
+    }
+
+    fun f2(f2Param: () -> Unit): MyClass {
+        f2Param()
+        return this
+    }
+
+    fun inClass() {
+        //Breakpoint!
+        f1 { test() }.f2 {
+            test()
+        }
+    }
+}
+
+fun test() {}
+
+// SMART_STEP_INTO_BY_INDEX: 3