Loadable plugins page provides an example of plugin code with comments, here is an excerpt from it:

// This is the main function, it is required to compile the plugin.
// By default the function implements our packages to handle the plugin creation and execution.
func main() {
    h, err := container.NewHandler(impl.Name())
    if err != nil {
        panic(fmt.Sprintf("failed to create plugin handler %s", err.Error()))
    }
    impl.Logger = &h

    err = h.Execute()
    if err != nil {
        panic(fmt.Sprintf("failed to execute plugin handler %s", err.Error()))
    }
}

I have a couple of issues understanding the following part:

By default the function implements our packages to handle the plugin creation and execution.

There are several issues:

1. "by default" means "in absence of any opposing action". An absence of what is meant in this context? I can only guess author's intent, but "usually the function implements ..." or "typically the function implements ..." or "at a minimum function implements ..." would make more sense.
2. "function implements our packages" is a weird thing to say. Package is a bigger chunk of source code defining functions, classes, types and whatnot. It can theoretically consist of a single function, but even then it would be strange to say that "function implements package". And it is never correct to say that "function implements packages" in plural form. I would guess that something like "function asks our packages to handle ..." or "function instructs our packages to handle ..." was meant instead.
3. It says "our packages" about packages developed and maintained by Zabbix in a piece of documentation that is essentially a tutorial guiding user through a process of creating a plugin. A few lines above another code comment says "Register our metric ..." referring to a metric, collectively implemented by the author and the reader of documentation. I would suggest to fix this inconsistent use of "our" by saying "Zabbix packages" instead of "our packages".