Use box tests to check if the light analysis mode (without analyzing bodies when possible) produces the same result as the complete analysis. See also the next commit in which light analysis mode is applied. Note that no tests were changed.

compiler/testData/codegen/light-analysis/extensionFunctions/kt1953_class.txt

@@ -0,0 +1,11 @@
+public final class A {
+    private final field sb: java.lang.StringBuilder
+    public method <init>(): void
+    public final @org.jetbrains.annotations.NotNull method foo(): java.lang.String
+    public final method unaryPlus(@org.jetbrains.annotations.NotNull p0: java.lang.String): void
+}
+
+
+public final class Kt1953_classKt {
+    public final static @org.jetbrains.annotations.NotNull method box(): java.lang.String
+}