Nested templates (within templates)

Hi, I've been trying to work this out, but I can't! Is there a way to refer to another template inside of another template, with ReSharper Ultimate 2016.1?

Example, Act/Arrange/Assert should be in all tests:

template keyword: aaa

// Act

// Arrange

// Assert

template keyword: test

[Test]

public void $TestName$()

{

    <use template aaa as the contents>

}

This would be useful as I have more than one test template, and it's unmaintainable to have to update each of them manually when I change something about my Arrange/Act/Assert, such as to make a default assertion or set up test variables I always use.