testdata for IDEA-133935

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/lambda/newMethodRef/IDEA133935.java

@@ -0,0 +1,24 @@
+
+import java.util.List;
+import java.util.Map;
+import java.util.TreeMap;
+
+import static java.util.stream.Collectors.joining;
+import static java.util.stream.Collectors.toMap;
+
+class X {
+  public static Map<String, String> dumpCurrentRequestHttpHeaders(HttpServletRequest req) {
+    if (req == null) {
+      return null;
+    }
+
+    return req.getHeaderNames().stream().collect(toMap((String headerName) -> headerName,
+                                                       (String headerName) -> req.getHeaders(headerName).stream().collect(joining(", ")), (String s1, String s2) -> s1 + ", " + s2,
+                                                       TreeMap::new));
+  }
+
+  interface HttpServletRequest {
+    List<String> getHeaderNames();
+    List<String> getHeaders(String header);
+  }
+}