You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: parse.go
    path of file: ./repos/podman/vendor/github.com/containers/common/pkg/parse
    
    the code of the file until where you have to start completion: package parse

// this package contains functions that parse and validate
// user input and is shared either amongst container engine subcommands

import (

    
func ValidateVolumeCtrDir(ctrDir string) error {
	if ctrDir == "" {
		return errors.New("container directory cannot be empty")
	}
	if !path.IsAbs(ctrDir) {
		return fmt.Errorf("invalid container path %q, must be an absolute path", ctrDir)
	}
	return nil
}