IDEA-160988 Add inspection to merge adjacent Stream API calls

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/quickFix/inlineStreamMap/afterMapBoxed.java

@@ -0,0 +1,9 @@
+// "Merge 'map' call and 'boxed' call" "true"
+import java.util.List;
+import java.util.stream.IntStream;
+
+public class Main {
+  public static void test(List<CharSequence> list) {
+    list.stream().map(cs -> (String)cs).mapToInt(String::length).asLongStream().mapToObj(x -> (Long) (x * 2)).forEach(System.out::println);
+  }
+}