The macOS platform code for your plugin is located in
Pods/Development Pods/hello/../../example/macos/Flutter/ephemeral/.symlinks/plugins/hello/macos/Classes
in the Project Navigator.

You can run the example app by pressing the run (▶) button.

Step 2f: Add Windows platform code (.h+.cpp)

We recommend you edit the Windows code using Visual Studio.

Before editing the Windows platform code in Visual Studio,
first make sure that the code has been built at least once
(in other words, run the example app from your IDE/editor,
or in a terminal execute
cd hello/example; flutter build windows).

Then use the following steps:

Launch Visual Studio.

Select Open a project or solution, and select the
hello/example/build/windows/hello_example.sln file.