PY-13418 Unused whole multi-object-import when one of the imported objects not found

python/src/com/jetbrains/python/inspections/unresolvedReference/PyUnresolvedReferencesInspection.java

@@ -997,7 +997,12 @@ public class PyUnresolvedReferencesInspection extends PyInspection {
             if (element == null) {
               if (importElement.getImportedQName() != null) {
                 //Mark import as unused even if it can't be resolved
-                result.add(importElement.getParent());
+                if (areAllImportsUnused(importStatement, unusedImports)) {
+                  result.add(importStatement);
+                }
+                else {
+                  result.add(importElement);
+                }
               }
               continue;
             }

python/testData/inspections/PyUnresolvedReferencesInspection/OneUnsedOneMarked/a.py

@@ -0,0 +1,4 @@
+from library import foo,<error descr="Unresolved reference 'bar'">bar</error>
+
+
+print(foo)

python/testData/inspections/PyUnresolvedReferencesInspection/OneUnsedOneMarked/library.py

@@ -0,0 +1 @@
+foo = 0

python/testSrc/com/jetbrains/python/inspections/PyUnresolvedReferencesInspectionTest.java

@@ -361,6 +361,11 @@ public class PyUnresolvedReferencesInspectionTest extends PyInspectionTestCase {
     doTest();
   }
 
+  // PY-13418
+  public void testOneUnsedOneMarked() {
+    doMultiFileTest();
+  }
+
   @NotNull
   @Override
   protected Class<? extends PyInspection> getInspectionClass() {