void () { MutationSignature sig = MutationSignature.parse("this"); assertTrue(sig.mutatesThis()); assertFalse(sig.mutatesArg(0)); sig = MutationSignature.parse("param1 , param2"); assertFalse(sig.mutatesThis()); assertTrue(sig.mutatesArg(0)); assertTrue(sig.mutatesArg(1)); assertFalse(sig.mutatesArg(2)); sig = MutationSignature.parse(""); assertFalse(sig.mutatesThis()); assertFalse(sig.mutatesArg(0)); }