warn about unused parameter if method is used locally as method reference as it could be transformed to equivalent lambda (IDEA-157988)

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

@@ -77,7 +77,7 @@ abstract class AbstractCollection<E> implements Collection<E> {
     public boolean add(E e) {
         return true;
     }
-    public boolean addAll(Collection<? extends E> c) {
+    public boolean addAll(Collection<? extends E> <warning descr="Parameter 'c' is never used">c</warning>) {
         boolean modified = false;
         return modified;
     }

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

@@ -6,11 +6,11 @@ class Test {
         Test m(List<Integer> l1, List<Integer> l2);
     }
 
-    static Test meth(List<Integer>... lli) {
+    static Test meth(List<Integer>... <warning descr="Parameter 'lli' is never used">lli</warning>) {
         return null;
     }
 
-    Test(List<Integer>... lli) {}
+    Test(List<Integer>... <warning descr="Parameter 'lli' is never used">lli</warning>) {}
 
     {
         I <warning descr="Variable 'i1' is never used">i1</warning> = <warning descr="Unchecked generics array creation for varargs parameter">Test::meth</warning>;

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

@@ -1,7 +1,7 @@
 import java.util.stream.Stream;
 
 class A {
-  private void test5(Integer i, String... strings) {}
+  private void test5(Integer <warning descr="Parameter 'i' is never used">i</warning>, String... <warning descr="Parameter 'strings' is never used">strings</warning>) {}
   private void <warning descr="Private method 'test5(java.lang.Integer, java.lang.Integer, java.lang.String...)' is never used">test5</warning>(Integer i, Integer b, String... strings) {
     System.out.println(i);
     System.out.println(b);