lint is working for extensions

Author: iimironchuk

CHANGELOG.md

@@ -1,7 +1,7 @@
 ## 0.4.0
 
 - Added `allow_with_comments` parameter for `no_empty_block` lint.
-
+- Fixed an issue with `avoid_using_api` for extensions
 ## 0.3.0
 
 - Added `exclude` parameter for the following lints:

lib/src/lints/avoid_using_api/avoid_using_api_linter.dart

@@ -245,5 +245,30 @@ class AvoidUsingApiLinter {
           );
       }
     });
+
+    context.registry.addMethodInvocation((node) {
+      final methodName = node.methodName.name;
+      if (methodName != identifier) {
+        return;
+      }
+
+      final element = node.methodName.staticElement;
+      if (element == null || element.enclosingElement3 is! ExtensionElement) {
+        return;
+      }
+
+      final extensionElement = element.enclosingElement3! as ExtensionElement;
+
+      if (extensionElement.name != className) {
+        return;
+      }
+
+      final sourcePath = extensionElement.librarySource.uri.toString();
+      if (!_matchesSource(sourcePath, source)) {
+        return;
+      }
+
+      reporter.atNode(node.methodName, entryCode);
+    });
   }
 }