Import struct from main package into another package in golang

Question

I have two packages main and test. I'm working on test package and I need to import a struct that is decalared inside main package, but it seems to be impossible! This is my directory structure:

root/
├── test/
│   └── test.go
├── main.go
└── go.mod

go.mod:

module my_project

go 1.20

main.go:

package main

import "my_project/test"

type MainStruct struct {
    Name string
}

func main() {
    test.TestFunction()
}

test.go:

package test

func TestFunction() {
    // I want to access 'MainStruct' here
}

Is it possible to import from parent package?