code: func (v *CommandOverrideVerifier) Verify(path string) []error {
  	if v.root == nil {
  		return []error{fmt.Errorf("unable to verify path with nil root")}
  	}
  
  	// extract the plugin binary name
  	segs := strings.Split(path, "/")
  	binName := segs[len(segs)-1]
  
  	cmdPath := strings.Split(binName, "-")
  	if len(cmdPath) > 1 {
  		// the first argument is always "kubectl" for a plugin binary
  		cmdPath = cmdPath[1:]
  	}
  
  	errors := []error{}
  
  	if isExec, err := isExecutable(path); err == nil && !isExec {
  		errors = append(errors, fmt.Errorf("warning: %s identified as a kubectl plugin, but it is not executable", path))
  	} else if err != nil {
  		errors = append(errors, fmt.Errorf("error: unable to identify %s as an executable file: %v", path, err))
  	}
  
  	if existingPath, ok := v.seenPlugins[binName]; ok {
  		errors = append(errors, fmt.Errorf("warning: %s is overshadowed by a similarly named plugin: %s", path, existingPath))
  	} else {
  		v.seenPlugins[binName] = path
  	}
  
  	if cmd, _, err := v.root.Find(cmdPath); err == nil {
  		errors = append(errors, fmt.Errorf("warning: %s overwrites existing command: %q", binName, cmd.CommandPath()))
  	}
  
  	return errors
  }
docs: // Verify implements PathVerifier and determines if a given path
  // is valid depending on whether or not it overwrites an existing
  // kubectl command path, or a previously seen plugin.