new inference: method references: process varargs

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/lambda/methodRef/Varargs2.java

@@ -0,0 +1,55 @@
+class Main {
+
+  <T, R, P> Collector<T, R> m(Supplier<? extends R> supplier, BiConsumer<R, T, P> accumulator) {
+    return null;
+  }
+
+  Collector<String, Main> test2(Supplier<Main> sb) {
+    return m(sb, Main::append);
+  }
+
+  public Main append(String... str) {
+    return this;
+  }
+
+
+  interface Supplier<T> {
+    public T get();
+  }
+
+  interface Collector<T, R> {
+  }
+
+  interface BiConsumer<T, U, P> {
+    void accept(T t);
+  }
+
+}
+
+class Main1 {
+
+  <T, R, P> Collector<T, R> m(Supplier<? extends R> supplier, BiConsumer<R, T, P> accumulator) {
+    return null;
+  }
+
+  Collector<String, Main1> test2(Supplier<Main1> sb) {
+    return m(sb, Main1::append);
+  }
+
+  public Main1 append(Main1... str) {
+    return this;
+  }
+
+
+  interface Supplier<T> {
+    public T get();
+  }
+
+  interface Collector<T, R> {
+  }
+
+  interface BiConsumer<T, U, P> {
+    void accept(T t);
+  }
+
+}