FIR: fix contract deserialization for assertIs<T>

idea/idea-frontend-fir/idea-fir-low-level-api/tests/org/jetbrains/kotlin/idea/fir/low/level/api/diagnostic/compiler/based/DiagnosisCompilerFirTestdataTestGenerated.java

@@ -5445,6 +5445,12 @@ public class DiagnosisCompilerFirTestdataTestGenerated extends AbstractDiagnosis
                 KtTestUtil.assertAllTestsPresentByMetadataWithExcluded(this.getClass(), new File("compiler/fir/analysis-tests/testData/resolveWithStdlib/smartcasts"), Pattern.compile("^([^.]+)\\.kt$"), null, true);
             }
 
+            @Test
+            @TestMetadata("assertIs.kt")
+            public void testAssertIs() throws Exception {
+                runTest("compiler/fir/analysis-tests/testData/resolveWithStdlib/smartcasts/assertIs.kt");
+            }
+
             @Test
             @TestMetadata("tryWithLambdaInside.kt")
             public void testTryWithLambdaInside() throws Exception {